Crustacea Resources | Natural History Museum of Los Angeles

A close-up view of marine pill bugs (subphylum Crustacea, order Isopoda, family Sphaeromatidae) living on a sea fan or gorgonian (phylum Cnidaria, class Anthozoa, order Octocorallia)
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What's On This Crab?

Decorator crabs (superfamily Majoidea) use their claws to collect bits of invertebrates and algae from their environment and attach them to their exoskeletons.  They have hooked bristles, or setae, on their carapace that hold the decorations in place.  These decorations provide camouflage and chemical defenses to help protect them from predators.

 

Crustacea Resources