Diving Fun Fact

Rusty Guard Crabs (Trapezia bidentata), Huatulco, Mexico

Rusty Guard Crabs (Trapezia bidentata) grow to be no more than two inches wide. These tiny crustaceans live out their lives along the branches of small polyp corals like Pocilloporas and Acroporas; with whom they share a mutualistic relationship.

As their name suggests, the guard crab protects the coral from predators, often by waving their fat, stubby claws at any perceived threat. In return, the crabs feed on the coral’s polyps and mucus, typically massaging the polyps until the mucus is released and collected in their leg hairs before being passed to their mouths.

We photographed this Rusty Guard Crab during a dive in Huatulco, Mexico. Read more in our post, Scuba Diving Huatulco Mexico.

More Diving Fun Facts

The Bullseye Round Stingray (Urobatis concentricus), Hualtuco, Mexico
Thornback Cowfish (Lactioria fornasini), Gili Air, Lombok, Indonesia
Hermit Crab, Ari Atoll, The Maldives
Manta Ray, Laughing Bird Caye, Belize
Yellow Stingray (Urobatis jamaicensis, Laughing Bird Caye National Park, Belize
Loggerhead Sea Turtle (Caretta caretta), Silk Cayes Marine Reserve, Belize
Nurse Shark ( Ginglymostoma cirratum), Silk Cayes Marine Reserve, Belize
Pacific Arrow Crab (Stenorhynchus debilis) , Huatulco, Mexico
Pacific Seahorse (Hippocampus ingens), Hualtuco, Mexico
Translucent Gorgonian Shrimp (Manipontonia psamathe), Anilao, Philippines
Southern Stingray (Hypanus americanus), Huatulco, Mexico
Jewel Moray (Muraena lentiginosa), Huatulco, Mexico
Durban Dancing Shrimp (Rhynchocinetes durbanensis), Ko Phi Phi, Thailand
Psychedelic Batwing Sea Slug (Sagaminopteron psychedelicum), Gili Air, Indonesia
Nudibranch (Thecacera picta)
Poison Ocellate Octopus (Amphioctopus siamensis),  Anilao, Philippines
The Hairy Frogfish (Antennarius striatus), Anilao, Philipinnes
The Pelican. Cabo San Lucas, Mexico
Blue Spiny Lobster (Panulirus inflatus), El Arco, Cabo San Lucas, Mexico
Spiny Tiger Shrimp (Phyllognathia ceratophthalma), Anilao, Philippines
Bullseye Electric Ray, Isla del Espiritu Santo, Baja California Sur, Mexico
California Sea Lion, Isla del Espiritu Santo, Baja California Sur, Mexico
Cowries Zamboanguita, Philippines
Whale Shark, Nosy Be, Madagascar

© 2018 MyMola |  Privacy Policy