The Strombus dentatus, or toothed conch, is a marine gastropod mollusk in the family Strombidae, known for its distinctive shell. It's a relatively small conch, with a shell length ranging from about 22 to 52mm. The shell has a flaring outer lip with a notch near the anterior end, and is characterized by three pointed projections near the opening. It is found in the Indo-Pacific region, typically at low tide marks.
Here's a more detailed description:
Shell Shape and Size: The shell is relatively small, with a maximum size of 6 cm (male/unsexed). It is elongate and moderately large.
Outer Lip: The outer lip is flared and features a stromboid notch, a key characteristic of the Strombidae family. It also has three pointed projections near the anterior end.
Color: The shell can be cream, orange, or salmon-pink.
Surface: It has a relatively smooth surface, though it can have spines on the body whorl.
Spire: The spire is short and pointed.
Habitat: Strombus dentatus is typically found in shallow, sandy waters, sometimes buried in sand or rubble, on seaward reefs at depths of 5 to 25m.
Distribution: They are found in the Indo-Pacific region, including the Red Sea, Indian Ocean, and Pacific Ocean
Babylonia lutosa, commonly known as the lutose Babylon, is a species of marine gastropod mollusk, or sea snail, belonging to the family Babyloniidae. These snails are characterized by their brown or yellowish-brown shells with darker spiral bands, often reaching up to 4 cm in length. The body of the snail is typically pale yellowish-brown with darker spots. They are nocturnal and burrow into sediment during the day, earning them the nickname "mud snails".
Here's a more detailed description:
Shell: The shell is typically brown or yellowish-brown with darker spiral bands.
Size: It can grow up to 4 cm in length.
Body: The body is usually pale yellowish-brown with darker spots.
Behavior: They are active at night and burrow into sediment during the day.
Habitat: They are found in marine environments, often in muddy or sandy bottoms.
Distribution: Their distribution ranges from Japan to Sri Lanka.
Scientific Classification: They belong to the order Neogastropoda, family Babyloniidae
Mitra papalis, commonly known as the Papal Mitre or Pontifical Mitre, is a species of sea snail in the Mitridae family. These snails are characterized by their large, white shells with vibrant red-orange or purplish blotches, and their overall form resembling a Papal mitre. They can reach lengths of up to 166 millimeters (6.5 inches).
Here's a more detailed description:
Shape:
The shells are elongate to ovate, fusiform, and smooth, lacking axial streaks.
Color:
The shell surface is typically white with small, white nodules under the sutures.
Blotches:
They have several rows of irregular, bright red-orange or purplish blotches.
Aperture:
The aperture is moderately wide and smooth on the inside.
Sutures:
Sutural coronations are present, and the sutures are more adpressed compared to similar species like Mitra stictica.
Similarities to Mitra stictica:
Mitra papalis is similar to Mitra stictica, but it has a longer body form, more adpressed sutures, and wider nodules.
Maretia planulata, commonly called the Sea Mouse Urchin or Longspine Heart Urchin, is a species of heart urchin that is known for its algae-eating habits and its role in maintaining a healthy aquarium environment. These urchins are found in sandy, intertidal areas and seagrass beds, typically to depths of 60 meters. They are sediment feeders, meaning they burrow through the substrate and process edible bits of food found within it.
Key characteristics and description:
Appearance: The Sea Mouse Urchin has a distinctive oval shape with a more elongated body than some other urchin species. It has sparse, long spines that are banded brown/orange and white, interspersed with many shorter, moveable white spines.
Size: They grow to about 6 cm in length.
Behavior: They are mainly nocturnal, often only emerging at night.
Diet: They are omnivores and can be supplemented with green feed when algae are not plentiful.
Habitat: They prefer sandy environments and can be found in intertidal zones and seagrass beds.
Reef-safe: They are considered reef-safe and can coexist with other marine life in an aquarium.
Tripneustes gratilla, commonly known as the collector urchin or Halloween urchin, is a species of sea urchin. It's a herbivorous echinoderm found in various tropical habitats like coral reefs, seagrass meadows, and algal forests. These urchins have a dark, often bluish-purple test (shell) with white or orange spines, sometimes completely white or orange-tipped.
Key Features and Behaviors:
Color: While typically dark, their spines can vary from white to orange, with some having orange tips or being entirely white.
Test: The test is usually dark, especially in interradial regions, which are the areas between the spines.
Spines: They possess long, obvious spines, and their spines are often inclined towards adjacent ambulacra, giving the appearance of a pentaradiate cross.
Podia: These urchins have long and obvious tube feet (podia) that help them move and collect debris.
Diet: Tripneustes gratilla is herbivorous, feeding primarily on algae.
Habitat: They are found in a variety of tropical habitats, including coral reefs, seagrass meadows, and algal forests.
Covering Behavior: They are known for their "covering behavior," using tube feet to cover their aboral (top) surface with debris like rocks and other materials.
Predators: Common predators include pufferfishes, octopuses, and humans.
Venom: They possess venom but it doesn't typically cause severe stings.
Edibility: While they are not the most commonly consumed sea urchin, some cultures do eat their gonads.
Other names: They are also known as cake, Parson's hat, Halloween, Hawaiian, priest-hut, pincushion, and hairy sea urchins
Diadema setosum, commonly called the diadem urchin or long-spined sea urchin, is a species of long-spined sea urchin known for its distinct five white dots and extremely long, hollow, mildly venomous spines. It's a typical sea urchin, with a round, hard shell (test) and numerous spines. Diadema setosum is primarily found in the Indo-Pacific region, including areas from Australia and Africa to Japan and the Red Sea.
Key Features:
Spines: Long, hollow, and sharp spines that can cause painful stings, though only slightly venomous.
Test: A round, hard shell made of fused plates.
Color: Black or dark brown, with five distinctive white spots on its body.
Habitat: Shallow tropical reefs in the Indo-Pacific, from Australia to Japan and the Red Sea.
Behavior: Primarily a grazer, active at night, and vulnerable to predation from fish.
Size: Maximum test diameter of 90 mm.
Symbiotic relationships: Can host the urchin shrimp Stegopontonia commensalis.
Diet: Algae.
Distinguishing Features:
Diadema setosum can be distinguished from its sister species, D. savignyi, by the presence of white spots on its test, while D. savignyi has blue markings.
Archaster typicus, commonly known as the sand sifting starfish or common sea star, is a marine invertebrate with a flat, gray or brownish body. They have five long, slightly tapering arms, though variations with three, four, or even six arms can occur. These starfish are adapted to life on sandy seabeds, where they bury themselves during high tide and move on the surface during low tide.
Key Characteristics:
Shape and Size: Five-limbed star with long, slightly tapering arms. Adults reach 12-15 cm in diameter.
Coloration: Grey or brownish, often with darker and lighter patches, sometimes forming a chevron pattern. Underside is pale.
Habitat: Sandy seabed, where they burrow and move over the surface.
Feeding: They are detritivores, feeding on organic matter in the sand.
Behavior: Active in the top layers of the sand, stirring it to prevent sediment buildup and promote oxygenation.
In Marine Aquariums:
Beneficial: They are popular in reef aquariums for cleaning and aerating the sand bed.
Peaceful and Reef-Safe: They are peaceful and won't harm fish, corals, or other invertebrates.
Maintenance: Require a thick sandy bottom and proper water conditions (temperature, pH).
Deep Cleaning: They stir the top layers of sand (up to 3 cm deep) but don't clean deeply below that.
Conomurex luhuanus, commonly known as the Strawberry Conch or Tiger Conch, is a medium-sized sea snail. It's a marine gastropod mollusk belonging to the family Strombidae, which includes true conchs. These snails are known for their vibrant shell interiors, typically colored orange, red, or pink, with a black or chocolate-brown inner lip border.
Here's a more detailed description:
Appearance:
The shell exterior can have a mottled, striped, or banded pattern, often with pink and white colors reminiscent of strawberries. The interior of the shell is the most striking feature, showcasing bright shades of orange, red, or pink.
Size:
Conomurex luhuanus can grow up to 8 cm (approximately 3 inches) in length.
Diet:
These snails are herbivores, feeding on algae, detritus, and organic matter. They also consume bristleworms and cyanobacteria.
Habitat:
They are found in the Indo-Pacific region, inhabiting sandy bottoms of coral reefs, seagrass beds, and coral rubble. They can also be found in coastal lagoons and other protected areas with clear bottom.
Behavior:
Conomurex luhuanus are known for their high visual acuity, with some studies suggesting they can resolve objects with high spatial resolution.
Ecological Role:
They play a vital role in marine ecosystems by consuming algae, detritus, and other organic matter, contributing to the overall health of the environment.
Social Behavior:
They can be found in colonies, both with juvenile and mixed age-class individuals.
Rochia nilotica, commonly called the commercial top shell, is a marine gastropod mollusk. It's a sizable, heavy, and conical sea snail, with a shell length ranging from 50mm to 165mm and a diameter of 100mm to 120mm . The shell is thick, has an off-white color with irregular axial reddish stripes, and is found in marine environments like tropical reefs.
Here's a more detailed description:
Shape: The shell is conical and subperforate, meaning it has a circular opening at the apex.
Size: It can reach lengths of 50mm to 165mm and diameters of 100mm to 120mm.
Color: The shell is off-white with large, irregular reddish stripes.
Surface: The body whorl is smooth, with concave sides above a protruding, acutely rounded, and thickened periphery .
Other features: The base of the shell is flat and marked with shallow spiral ridges. The aperture (opening) is square-shaped.
Habitat: It is found in marine environments, particularly tropical reefs.
Rochia nilotica is considered a commercially important species, both as a food source and a source of mother-of-pearl for jewelry and buttons. It is also known as a trochus shell or topshell
Echinaster sepositus, the Mediterranean red sea star, is a species of starfish from the East Atlantic, including the Mediterranean Sea.
Description
Echinaster sepositus has five relatively slender arms around a small central disc. It usually has a diameter of up to 20 cm (8 in), but can exceptionally reach up to 30 cm (12 in).It is a bright orange-red in colour, and has a soapy surface texture unlike superficially similar Henricia starfish (another somewhat similar species from the same region is Ophidiaster ophidianus). The surface is dotted with evenly spaced pits from which the animal can extend its deep red gills (papula).
Distribution
Echinaster sepositus is found in the East Atlantic north of the Equator, including the Mediterranean Sea where it is one of the most common starfish (although virtually absent from some localities). Its northern limit is the English Channel, but only on the French side. It is found at depths of 1 to 250 m (3–820 ft) in a wide range of habitats, including rocky, sandy and muddy bottoms, and sea grass meadows (Posidonia oceanica and Zostera)
Hymenocera picta, commonly known as the harlequin shrimp, is a species of saltwater shrimp found at coral reefs in the tropical Indian and Pacific Oceans. It is usually considered the only species in the genus Hymenocera, but some split it into two species: H. picta from the central and east Pacific, where the spots are deep pinkish-purple with a yellow edge, and H. elegans from the Indian Ocean and west Pacific, where the spots are more brownish and have a blue edge. They reach about 5 cm (2.0 in) in length, live in pairs, and feed exclusively on starfish, including crown-of-thorns starfish. They do seem to prefer smaller, more sedentary starfish, but as these generally are not sufficiently numerous for their needs, they commonly attack crown-of-thorns starfish, both reducing its consumption of coral while under attack, and killing it within a few days.
Description
The harlequin shrimp is usually cream colored or white with occasional spots. Around the Pacific Ocean, many of these shrimp have red spots, while the Indian Ocean shrimp typically have purple spots; the Hawaiian H. picta has purple and red spots on its body, the shrimp has two walking legs on each side and large claws, or chelipoda. The claws and eyes appear to look flattened and thin. On its head, the shrimp has "petal-like sensory antennules" to smell out prey. Its body usually reaches up to 5 cm (2 in), and the male is slightly smaller than the female.
Habitat
These shrimp are typically found in Hawaii through the Indo-Pacific below the intertidal zone on coral reefs. They prefer temperatures of 72–82°F, but are very rare because of the changing coral reefs.
Diet
Harlequin shrimp usually only feed on starfish. They are very skilled at flipping over a slow starfish on its back, and eating the tube feet and soft tissues until it reaches the central disk. They, usually one female and one male, use their claws to pierce the tough skin and feeding legs to help them maneuver the starfish. Sometimes, the starfish will shed the arm that the shrimp attacked and regrow it, but it is usually too wounded to regrow. They may also feed on sea urchins, because they have tube feet, as well, but that is rare and only if starfish are not available.
Behavior/reproduction
The harlequin shrimp moves at a very slow pace and in waves. It also may have toxins from its prey (the starfish), which could make it distasteful and potentially dangerous for predators. The shrimp also moves its claws almost constantly. Females are larger and have colored abdominal plates unlike the males. The female produces between 100 and 5,000 eggs per season depending on environmental factors. The male and female are often seen together in the wild, and work together to not only reproduce, but also to forage.
Most commonly found is pure blue, dark blue, or light blue, although observers find the aqua, purple, or orange variation throughout the ocean. These sea stars may grow up to 30 cm (11.8 in) in diameter, with rounded tips at each of the arms; some individuals may bear lighter or darker spots along each of their arms. Individual specimens are typically firm in texture, possessing the slightly tubular, elongated arms common to most of other members of the family Ophidiasteridae, and usually possessing short, yellowish tube feet. An inhabitant of coral reefs and sea grass beds, this species is relatively common and is typically found in sparse density throughout its range. Blue stars live subtidally, or sometimes intertidally, on fine (sand) or hard substrata and move relatively slowly (mean locomotion rate of 8.1 cm/min).
The genus Linckia, as is true of other species of starfish, is recognized by scientists as being possessed of remarkable regenerative capabilities, and endowed with powers of defensive autotomy against predators.Although not yet documented, L. laevigata may be able to reproduce asexually. L. laevigata is apparently not an exception to this behavior, as many individuals observed in nature are missing arms or, on occasion, in the comet form.
This sea star is fairly popular with marine aquarium hobbyists, where it requires a proper, slow acclimatization before entering the tank system, and an adequate food source similar to that found in its natural habitat. Generally thought of as a detritivore, many sources maintain that this species will indefinitely graze throughout the aquarium for organic films or sedentary, low-growing organisms such as sponges and algae. In the marine aquarium hobby, they have been seen to consume Asterina Starfish, which are commonly introduced into such aquaria on the ubiquitous "live rock" used in such settings.
