Common name: Spotted Trapezia Crab

General information

The Spotted Trapezia Crab, scientifically known as Trapezia guttata, is a small and colorful reef crab known for its symbiotic relationship with Pocillopora corals. It is characterized by its bright coloration, typically yellow to orange with distinctive purple spots. This species is not only fascinating to observe but also plays a crucial role in the health of its coral host.

Care

Trapezia guttata is a hardy species that can be a great addition to a reef aquarium with established Pocillopora coral colonies. They require stable water conditions and will benefit from regular feedings of meaty foods, although they also scavenge for algae and detritus. It's important to ensure that the aquarium has plenty of live rock for hiding and foraging.

Reproduction

In the wild, these crabs are known to form monogamous pairs that live together within the branches of their host coral. They reproduce by releasing larvae into the water column, which then go through a planktonic stage before settling onto a suitable coral.

Symbiosis

The Spotted Trapezia Crab has a mutualistic relationship with Pocillopora corals, where it lives and protects the coral from crown-of-thorns starfish and other predators. In return, the crab receives shelter and food in the form of mucus, plankton, and detritus caught by the coral. This relationship is vital for the survival of both organisms and is a classic example of marine symbiosis.

Habitat

Trapezia guttata is found in the Indo-Pacific region, from the Red Sea to the central Pacific. They are typically associated with shallow reef environments where Pocillopora corals thrive.