Common name: Red Spotted Coral Crab

General information

Trapezia tigrina, commonly known as the Tiger Trapezia or Trapezia Crab, is a small, brightly colored reef crab known for its symbiotic relationship with Pocillopora corals. Its carapace is adorned with a pattern of stripes and spots that range from orange to red, with white and sometimes purple, which provides excellent camouflage among the branches of its host coral.

Care

Trapezia crabs are relatively easy to care for in a well-established reef aquarium. They require stable water conditions and plenty of live rock for hiding and foraging. These crabs are peaceful and can coexist with a variety of tank mates, but they should not be kept with large, aggressive fish that may prey on them.

Reproduction

Trapezia crabs are known to form monogamous pairs, and they exhibit a unique breeding behavior where the female carries the fertilized eggs until they hatch into larvae. The larvae are planktonic and can be challenging to rear in captivity.

Symbiosis

The most notable aspect of Trapezia tigrina is its symbiotic relationship with Pocillopora corals. The crab defends the coral from predators and keeps it clean from debris and algae, while the coral provides the crab with shelter and food in the form of mucus and detritus.

Habitat

Trapezia tigrina is found in the Indo-Pacific region, from the Red Sea to the central Pacific. It inhabits shallow coral reefs, typically associating with species of the genus Pocillopora. This close association is vital for the crab's survival, as it relies on the coral for protection and sustenance.