Description
Stenorhynchus seticornis, or the yellowline arrow crab, is a crustacean with a triangular body, a long, pointed rostrum (snout), and long, spindly legs. Its color is variable, often golden-brown or yellow, with lines on the carapace and reddish or yellow legs. The claws are frequently blue or violet-tipped.
Physical characteristics
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Body: Triangular shape, resembling an arrowhead.
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Rostrum: An extremely elongated, pointed snout, often with serrated edges.
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Legs: Long and thin, sometimes spanning up to 10 cm (3.9 in).
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Claws: The first pair of legs are transformed into claws, which are often blue or violet at the tips.
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Size: Carapace length is typically 3 to 6 cm (1.2 to 2.4 in).
Coloration
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Body: Can be golden, yellow, or cream.
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Markings: Often features fine dark, brown, or iridescent blue lines on the carapace.
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Legs: Can be reddish or yellow.
Habitat and behavior
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Habitat: Found in the western Atlantic, from North Carolina to Brazil, and is common on coral reefs in the Caribbean.
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Behavior: It is a nocturnal scavenger that feeds on small invertebrates, detritus, and parasites off of fish.
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Association: Often lives in groups near sea anemones.
