Shane Gross / Arrow crab (Stenorhynchus seticornis) on coral. Eleuthera, Bahamas.

Pascal Kobeh / Yellowline arrow crab (Stenorhynchus seticornis / lanceolatus), Canary Islands

Graham Eaton / Yellowline Arrow Crab (Stenorhynchus seticomis) in an Azure Vase Sponge (Callyspongia plicifera). St Lucia, West Indies, July.

Chris Newbert / Arrow Crab (Stenorhynchus seticornis) in Anemone (Heteractis sp) 60 feet deep, Caribbean

Norbert Wu / Arrow Crab (Stenorhynchus seticornis) long spindly arms around central arrow-shaped body, Caribbean

Roberto Rinaldi / Yellowline arrow crab (Stenorhynchus seticornis), on white gorgonian sea fan / lace sea fan (Eunicella singularis), Cayos Cochinos, Honduras.

Alex Mustard / Arrow crab (Stenorhynchus seticornis) resting in its home inside a Brown tube sponge (Agelas conifera), Grand Cayman, Cayman Islands, Caribbean Sea.

David Hall / Yellowline arrow crab (Stenorhynchus seticornis) feeding on an unidentified segmented worm, probably a polychaete tube worm (Sabellidae), Dominica, Caribbean, Western Atlantic Ocean.

Claudio Contreras / Yellowline arrow crab (Stenorhynchus seticornis), Cozumel Island, Caribbean Sea, Mexico.

Claudio Contreras / Yellowline arrow crab (Stenorhynchus seticornis), Cozumel Island, Caribbean Sea, Mexico.

Claudio Contreras / Yellowline arrow crab (Stenorhynchus seticornis) with featherstar, Cienaga de Zapata National Park, Matanzas Province, Cuba.