Xanthidae is a family of crabs known as gorilla crabs, mud crabs, pebble crabs or rubble crabs. Xanthid crabs are often brightly coloured and are highly poisonous, containing toxins which are not destroyed by cooking and for which no antidote is known. The toxins are similar to the tetrodotoxin and saxitoxin produced by puffer fish, and may be produced by bacteria in the genus Vibrio living in symbiosis with the crabs, mostly V. alginolyticus and V. parahaemolyticus.
Stenorhynchus is a genus of marine crabs in the family Inachidae, containing the following species:
Lybia is a genus of small crabs in the family Xanthidae. Their common names include boxer crabs, boxing crabs and pom-pom crabs. They are notable for their mutualism with sea anemones, which they hold in their claws for defense. In return, the anemones get carried around, which may enable them to capture more food particles with their tentacles. Boxer crabs use at least three species of anemones, including Bundeopsis spp. and Triactis producta. The bonding with the anemone is not needed for survival, however, and boxer crabs have frequently been known to live without them, sometimes substituting other organisms such as sponges and corals for the sea anemones.
Novactaea is a genus of crabs in the family Xanthidae, containing the following species:
Paractaea is a genus of crabs in the family Xanthidae, containing the following species:
Cyclodius is a genus of crabs in the family Xanthidae, containing the following species:
Euxanthus is a genus of crabs in the family Xanthidae containing the following species:
Hypocolpus is a genus of crabs in the family Xanthidae, containing the following species:
Miersiella is a genus of crabs in the family Xanthidae, containing the following species:
Paramedaeus is a genus of crabs in the family Xanthidae, containing the following species:
Allactaea lithostrota is a species of crabs in the family Xanthidae, the only species in the genus Allactaea.
Gaillardiellus is a genus of crabs in the family Xanthidae, containing the following species:
Heteractaea is a genus of crabs in the family Xanthidae, containing the following species:
Lobiactaea lobipes is a species of crabs in the family Xanthidae, the only species in the genus Lobiactaea.
Edwardsium is a genus of crabs in the family Xanthidae, containing the following species:
Monodaeus is a genus of crabs in the family Xanthidae, containing the following species:
Actiomera is a genus of crabs in the family Xanthidae, containing the following species:
Demania is a genus of crabs in the family Xanthidae, containing the following species:
Neoxanthops is a genus of crabs in the family Xanthidae, containing the following species:
Xanthias is a genus of crabs in the family Xanthidae, containing two exclusively fossil species and the following extant species:
