It is easy to see why the Scarlet Reef Hermit Crab is one
of the most popular reef maintenance animals. Paguristes cadenati is very hardy
and requires minimal care in a well-established system. More importantly,
however, these small hermit crabs have a voracious appetite for detritus and
algae. In fact, they are particularly fond of nuisance algae of the
filamentous, hair, and slime varieties, as well as cyanobacteria. Finally,
unlike some hermit crabs, most Scarlet Reef Hermit Crabs are very peaceful
towards their tankmates.

Also known as the Red Reef or Red Legged Hermit Crab, the
Scarlet Reef Hermit Crab is named for its bright red legs, which are contrasted
by their yellow face. Native to the reef faces and coral rubble of the
Caribbean and Western Atlantic, these active scavengers can consume large
amounts of animal matter and algae. Despite their large appetites and constant
feeding habits, the Scarlet Reef only grows to an adult size of 1-1/2" in
length.

In the home aquarium, Paguristes cadenati is best kept in
an established reef system with ample algae supplies. However, they will eat
almost anything, including fish food and invertebrate diets. If algae levels
are insufficient, supplement their diet with dried seaweed and other marine
foods.

Like other hermit crabs, an ample supply of empty shells
should be available for the Scarlet Reef Hermit Crab to move into as they molt
and grow. As with all invertebrates, they do not tolerate copper-based
medications and extreme fluctuations in water parameters. Also, take special
care to ensure an invertebrate-friendly environment free of predators.