The Doubleband Surgeonfish or Lieutenant Tang (Acanthurus tennenti), is a marine ray-finned fish in the family Acanthuridae. It is found in tropical and sub-tropical Indo-Pacific regions and can grow to be up to 50 cm (19.7") long.
Physical Description
The Doubleband Surgeonfish is a deep-bodied, laterally-compressed oval fish, with a body length over half its depth. It grows to an average length typically ranging between 25 cm (10 in) and 31 cm (12 in). Both male and female Doublebands are similar in appearance until they reach their breeding season, when the mature male takes on more vibrant hues or darker streaks to attract a mate. Coloration amongst the species can vary, ranging from orange-beige, olive-tan or steely grey, but can turn a dark-brown shade with hints of red or purple when stressed. A dark line runs along the base of the dorsal fin with a similar line at the base of the anal fin. There are two dark streaks behind the eye, with blackish scalpel-like scales that project from the caudal peduncle surrounded by a large black spot with a bluish border. Both dorsal and anal fins are long, extending out to the caudal peduncle. The caudal fin is crescent-shaped and continues to grow longer as the fish ages. It is rimmed by a band of bluish-white.
This species has a wide range of distribution across the tropical and subtropical Indo-Pacific region, extending from East Africa and Madagascar to southeast Asia, Sri Lanka, Malaysia, Thailand and Indonesia. They mostly reside on rocks and coral reefs, on the reef slopes, and in the channels between reefs. They can be commonly found at depths between 1-40m (3-131ft) and prefer waters with temperatures between 25-29°C.
Reproduction
Doublebands reproduce via external fertilization. Females will approach the reef surface and begin releasing their eggs, while the males follow their trail and release sperm as a response. Once the two gametes join and the egg is fertilized, the resulting larvae will float around for a certain period in the water column until they grow out of their planktonic stage. After approximately seven weeks, the larvae return to their reef habitat to settle in. The breeding season typically spans from July to August, with physical changes in preparation for this season beginning to occur cyclically around April.
Ecology
The Doubleband Surgeonfish feeds on algae growing on the seabed and detritus, as well as the algal film that grows on sand and other substrates. The juveniles tend to join other fish species to form mixed species groups. At first they may be black, or yellow with a black horseshoe-shaped eye ring, but later they resemble the adult fish, apart from the black markings behind the eye. This fish feeds in the open during the day, often in small groups with parrotfish and other species.
Status
This is a common fish in much of its range. It is sometimes caught for human consumption and commonly used in the aquarium trade. It is susceptible to the destruction of the reef habitats in which it lives, but is found in several marine protected areas. The International Union for Conservation of Nature has rated its conservation status as being of "least concern".
Acanthurus triostegus, commonly known as convict tang, manini,convict surgeonfish, convict surgeon, or fiveband surgeonfish, is a species of marine ray-finned fish belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. This species has a wide Indo-Pacific distribution.
Taxonomy
Acanthurus triostegus was first formally described in 1758 as Chaetodon triostegus by Carl Linnaeus, the description being published in the 10 edition of Systema Naturae with its type locality given as "Indies".The genus Acanthurus is one of two genera in the tribe Acanthurini which is one of three tribes in the subfamily Acanthurinae which is one of two subfamilies in the family Acanthuridae.
Etymology
Acanthurus triostegus was given the specific name triostegus which means "three covers", this may refer to the three branchiostegal membranes.
Description
The convict tang is so called because of its bold black stripes on a yellowish background. It is a laterally-compressed oval-shaped fishwith a maximum length of about 26–27 cm (10–11 in). The head is small with a pointed snout and a terminal mouth with thick lips. It has six black stripes which distinguishes it from the zebra tang (Acanthurus polyzona) which has nine, and has a more restricted range in the Indian Ocean. The first black stripe is oblique and passes through the eye. There are two black spots on the caudal peduncle, and on each side there is a sharp, retractable spine, which is used in offence or defence.
Distribution and habitat
Acanthurus triostegus occurs in the tropical Indo-Pacific region. Its range extends from the East African coast and Madagascar to southwestern Japan, Australia and Central America, including many Pacific island groups. It is found over hard bottoms in lagoons, reef slopes, bays and estuaries. Juveniles are common in tide pools, and larger fish are found at depths down to about 90 m (300 ft).
Biology
Acanthurus triostegus frequently feed in the vicinity of freshwater discharges, grazing filamentous algae off the rocks.Typically these tangs graze on filamentous algae growing on coral or rocky substrates. The adults aggregate in large schools to feed and these overwhelm damselfishes attempting to defend their territories. The males and females gather in aggegations to spawn.
Utilisation
Acanthurus triostegus is targeted as a food fish in many parts of its range and in some areas is commercially targeted. In Hawaii it is fished for by recreational anglers and it is also caught for the aquarium trade.
Acropora (or "Acros") are highly sought-after, fast-growing Small Polyp Stony (SPS) corals known for their brilliant colors and complex branching or plating structures.
As "crown jewels" of the reef hobby, they require intense lighting 250−600 PAR, high turnover water flow, and strict, stable water parameters, making them best for experienced aquarists.
Acropora corals are hard corals characterized by their branched or tabular morphology, fast growth rate, and high morphological plasticity. They are a vital functional group in coral reefs, creating complex habitats and covering hectares of reef surface.
Here's a more detailed look:
Key Characteristics:
Growth Pattern:
Acropora corals grow in colonies, with branches formed by axial and radial polyps.
Habitat:
They are typically found in shallow, clear, unpolluted water with ample light, temperature above 20°C, and constant salinity.
Morphology:
Their colonies can take on various forms, including arborescent (tree-like), table-like, corymbose (cushion-like), digitate (finger-like), hispidose, and encrusting.
Importance:
Acropora corals are crucial for building the structure of coral reefs and providing habitats for a variety of marine life.
Factors Affecting Acropora:
Water Quality: Clear, unpolluted water is essential for growth and survival.
Lighting: They require ample light for their symbiotic algae (zooxanthellae) to photosynthesize.
Temperature: Optimal temperatures above 20°C are needed.
Salinity: Constant salinity levels are important.
The Amblyeleotris guttata, also known as the Spotted prawn-goby, is a small, peaceful fish typically found in pairs, often associated with Pistol shrimp. They are characterized by a pale white or grey body with orange spots and dark markings on the pelvic fins and eyes. These gobies are commensal, meaning they live in a mutually beneficial relationship with Pistol shrimp, and are considered reef-safe.
Key Characteristics of Amblyeleotris guttata:
Appearance: Pale grey or white body with bright orange spots, darker pelvic fins, and black eye markings.
Commensal Relationship: They live in association with a pair of Pistol shrimp (genus Alpheus).
Diet: They are carnivores and planktonophages, with them as predators.
Temperament: Peaceful and reef-compatible.
Size: Typically reach a maximum size of 7 cm.
Origin: Native to the reef environments of the Western Pacific Ocean.
In Pairs: Spotted prawn-goby are often kept in pairs within an aquarium, and their natural behavior is to live with Pistol shrimp
The black Amphiprion ocellaris, also known as the black storm or Darwin ocellaris clownfish, is a striking variation of the common clownfish. These clownfish are naturally jet-black with white stripes, a stark contrast to the typical orange and white coloring. They are a captive-bred variant, meaning they do not naturally exist in the wild in their black form.
Key features of the black Amphiprion ocellaris:
Appearance:
Jet-black body with three distinct white stripes on each side. They may have a splash of orange on their face, especially when young, which disappears as they mature.
Size:
Reaches a maximum size of around 8 cm (3 inches).
Behavior:
They are known for their symbiotic relationship with anemones, providing shelter and protection for the clownfish and cleaning the anemone. They are also territorial over their anemone home.
Care:
They have the same care requirements as standard ocellaris clownfish. They need a well-established reef aquarium with a suitable host anemone, like the Bubble Tip anemone.
Diet:
They are omnivores and readily accept frozen, live, pellet, and flake foods.
The Black Da Vinci Clownfish (Amphiprion ocellaris) is a captive-bred, designer variant of the popular False Percula clownfish. Renowned for its artistic, paint-stroke-like white patterns set against a jet-black body, this hardy marine fish combines unique aesthetics with the peaceful temperament and easy care of the standard ocellaris.
Appearance: Features a stark black body (stemming from Darwin and black ocellaris lines) adorned with soft, wavy, and often swirling merged white bands. The tail usually ends in a bold black dot surrounded by white, and the white patterns can spill over onto the dorsal and pectoral fins.
Grading: These fish are selectively bred and graded based on white pattern coverage. Grade A typically has fused white stripes on both sides of the body, while Extreme grades show highly erratic, connected trailing stripes with maximum white coloration.
Size & Growth: Reaches a maximum adult length of about 3 inches (7.5 cm), with females typically growing larger than males.
Lifespan: Can live between 10 and 15 years in a well-maintained home aquarium.
Minimum Tank Size: 20 gallons for a single specimen or a juvenile pair; 30 gallons or more is ideal to allow for natural territorial movement.
Temperament: Peaceful and relatively docile, though they can display mild aggression when establishing territory or pairing up. They are 100% reef safe and will not nip at corals or invertebrates.
Diet: Omnivorous; they readily accept high-quality marine flakes, pellets, and various frozen foods like mysis shrimp, brine shrimp, and ocean plankton.
Host Anemones: While they do not strictly require an anemone to thrive in captivity, they can easily form symbiotic relationships with popular host anemones like the Bubble-Tip Anemone (Entacmaea quadricolor).
The Black Storm clownfish (Amphiprion ocellaris) is a designer strain of the Ocellaris clownfish, known for its striking black and white coloration. It features a predominantly black body with irregular, bold white markings, creating a marbled or "stormy" appearance. These markings, along with a white face and black eyes, make each fish unique.
Here's a more detailed description:
Coloration:
The Black Storm clownfish is characterized by a predominantly black body with varying degrees of white markings. These white markings can appear as bars, spots, or a marbled pattern, making each fish's appearance unique.
Facial Features:
The face is typically white, contrasting with the black body, and the fish has black eyes.
Designer Strain:
The Black Storm is a specific strain bred by aquarists, resulting in a visually appealing and sought-after variant of the Ocellaris clownfish.
Behavior:
Like other Ocellaris clownfish, Black Storm clownfish are generally peaceful and adaptable to captive environments. They are also known to establish relationships with their host anemones or other substitutes.
Care:
Black Storm clownfish, like other Ocellaris clownfish, are relatively easy to care for in a well-maintained saltwater aquarium. They require a 20+ gallon tank, live rock for hiding, and a moderate water flow.
Diet:
They can be fed aquarium pellets, flakes, and various frozen foods like Mysis shrimp and brine shrimp.
The DaVinci Ocellaris Clownfish (Amphiprion ocellaris) is a captive-bred designer morph prized for its unique, swirling white markings that resemble a painter's brushstrokes. Each individual features a completely unique pattern of connected and curvy white bands.
Key Characteristics
Appearance: Features a vibrant orange body with distinctive, flowing white patterns. Unlike standard ocellaris clowns, the white bands are often connected or elongated and delicately edged in black.
Grading: Marketed in different grades based on the amount of white. Grade B features wavy lines with distinct stripes, Grade A has fused stripes on both sides, and Extreme DaVinci features the most white, with multiple stripes connecting.
Origin: This morph does not exist in the wild. It was selectively bred in aquaculture facilities by crossing standard Ocellaris with other designer morphs like the Wyoming White clownfish.
Aquarium Care
Temperament: Peaceful, active, and well-suited for both beginner and advanced marine hobbyists.
Tank Size: A minimum of 75-90 liters (20 gallons) is recommended.
Reef Compatibility: 100% reef-safe. They readily host bubble-tip anemones or even soft corals.
Diet: Omnivorous; easily feeds on high-quality flakes, pellets, and enriched frozen foods like mysis and brine shrimp.
Size & Lifespan: Reaches an adult size of 3 to 4 inches (7.5–10 cm) and can live 8 to 12+ years with proper care.
A "Designer Pair" of Amphiprion ocellaris, also known as clownfish, refers to a specific type of clownfish that has been selectively bred for unique color and pattern variations. These variations, Salvador Dali, Black Ice Snowflakes, or Snow Storms, are not naturally occurring and are the result of controlled breeding programs. These pairs are sold as a bonded unit, meaning they are two fish that the breeders have observed together and are likely to live harmoniously.
Here's a breakdown:
Selective Breeding:
Designer clownfish are the result of breeding programs that aim to produce specific color and pattern variations in the common Ocellaris clownfish.
Examples:
Black Storms are known for their black body with irregular white markings. Black Ice Snowflake clownfish are a cross between a Black Ocellaris and a Snowflake, exhibiting both black and snowflake-like patterns. Snow Storms are a result of breeding Black Storms and Black Snowflakes, displaying black fins, icy blue edges, and unique facial patterns.
Pairing:
Buying a "Designer Pair" ensures that the fish are likely to be compatible and not exhibit aggression towards each other, unlike randomly selected individual fish.
Reef Compatibility:
These designer clownfish are generally reef compatible, meaning they can be kept in a reef aquarium with corals and other invertebrates.
Symbiotic Relationship:
Clownfish are known for their symbiotic relationship with anemones, and designer strains, like their wild counterparts, can be housed with anemones like Bubble Tip anemones.
Captive Bred:
These fish are captive-bred, meaning they are raised in controlled environments, which often makes them more adaptable to aquarium life and less susceptible to diseases compared to wild-caught specimens.
Amphiprion ocellaris, commonly known as the Ocellaris clownfish or False Percula clownfish, is a small (up to 11 cm/4.3 inches), brightly colored saltwater fish famously depicted in Finding Nemo. It has an orange-to-reddish-brown body with three white, black-outlined bands and a symbiotic relationship with sea anemones.
Physical Characteristics
Coloration: Typically vibrant orange with three vertical white bands: one behind the eye, one in the middle, and one on the tail base.
Color Variations: A naturally occurring black variant exists, often referred to as the Darwin Ocellaris.
Distinctive Features: The middle white band has a forward-projecting bulge. Fins are outlined with fine black lines.
Distinction: A. ocellaris is often mistaken for Amphiprion percula, but ocellaris has thinner black edging around the white bands and a taller dorsal fin.
Eye: Features a muddy brown ring around the pupil, unlike the bright orange ring of A. percula.
Habitat and Behavior
Location: Found in the tropical waters of the Indo-Pacific, including the Great Barrier Reef and Southeast Asia.
Symbiosis: Lives in shallow reefs and lagoons (usually shallower than 50 feet) within the tentacles of specific sea anemones, including Heteractis magnifica and Stichodactyla gigantea.
Social Structure: Known for living in small hierarchical groups, where they are protandrous hermaphrodites—the largest fish is the female, and the next largest is the male.
Diet and Reproduction
Diet: Omnivorous, feeding on plankton, algae, and small invertebrates.
Breeding: They are oviparous (egg-laying) and monogamous. Eggs are laid near the host anemone, and the male is responsible for cleaning and fanning them until they hatch, which usually happens after sunset.
Aquarium Care
Popularity: One of the most popular marine fish for aquariums due to their hardy nature and suitability for captive breeding.
Lifespan: Can live up to 12 years in captivity.
The ocellaris clownfish, or Amphiprion ocellaris, is a vibrant marine fish known for its striking orange body, three white bands, and black outlines. These fish, also called false percula clownfish or common clownfish, form a symbiotic relationship with sea anemones, using their mucus-covered skin to avoid being stung by the anemone's tentacles.
Physical Characteristics:
Color: Primarily bright orange with three distinct white bands.
Bands: The white bands are usually outlined in black. The middle band often has a rounded bulge in the middle.
Size: Typically grow to about 3-5 inches (8-11 cm) in length.
Fins: Black markings on the fins, particularly the dorsal fin, are common.
Other Notable Features:
Symbiotic Relationship:
They have a mutually beneficial relationship with sea anemones, living among their tentacles for protection from predators.
Protective Mucus:
A special layer of mucus on their skin protects them from the anemone's stinging cells.
Protandrous Hermaphrodites:
All begin life as males and can change to females as they mature, with the largest fish in a group typically being female.
Regional Variations:
While typically orange, some can be darker red-orange or even black with white bands, depending on their location.
