Trapezia intermedia (Common guard crab)


The common guard crab is a small coral crab with light brown to orange carapace with red dots and blue eyes. They live solitary or in groups and may occur amongst other guard crab species.


Unassessed by the IUCN Red list. It is fairly common, but easily overseen since it hides amongst coral branches.


Central Pacific, Micronesia and French Polynesia and the Hawaiian islands. It can be found between the branches of Pocillopora corals, in a depth range of 0-8 meters.


Before mating, these crabs commonly perform courtship rituals. Reproduction is sexual, but sperm transfer indirect.


Up to 1,5 cm.

Prey / Predation

Trapezia intermedia feeds on zooplankton.

Special features

These guard crabs are very protective of their homes and will defend it from intruders (even much larger ones). Trapezia intermedia uses its large claws to ward off any threats.