Spotted cleaner shrimp (Periclimenes yucatanicus) sits on its host sea anemone (Actiniaria), Bonaire, Caribbean Netherlands.

Spotted cleaner shrimp (Periclimenes yucatanicus) on a green sea anemone (Actiniaria), Puerto Galera, Philippines.

A cleaner shrimp searches for parasites on the head of this spotted moray eel, Tulamben, Bali, Indonesia.

Spotted cleaner shrimp in giant anemone, Bonaire, Caribbean Sea, Central America

Spotted Cleaner shrimp (Periclemenes yucatanicus) on anemone, Curacao, Netherlands Antilles. Caribbean.

Starry Toadfish; cleaner shrimp on mouth (Arothon stellatus). Indo Pacific

Scuba diver and Spider hermit crabs in anemone, Stenorhynchus seticornis, Netherlands Antilles, Bonaire, Caribbean Sea

Spotted cleaner shrimp in anemone, Periclimenes yucatanicus, Netherlands Antilles, Bonaire, Caribbean Sea

Spotted cleaner shrimp in anemone, Periclimenes yucatanicus, Netherlands Antilles, Bonaire, Caribbean Sea

Spider hermit crab, Stenorhynchus seticornis, Netherlands Antilles, Bonaire, Caribbean Sea

Two Spider hermit crabs, Stenorhynchus seticornis, Netherlands Antilles, Bonaire, Caribbean Sea

Spider hermit crabs in anemone, Stenorhynchus seticornis, Netherlands Antilles, Bonaire, Caribbean Sea

Spider hermit crabs in anemone, Stenorhynchus seticornis, Netherlands Antilles, Bonaire, Caribbean Sea