Pitho Crab - Pitho mirabilis

The Pitho Crab is a small, hardy invertebrate valued for its algae-eating habits and unique appearance. With a rounded body often covered in bits of algae or sponge for camouflage, this peaceful crab is a helpful addition to reef tanks where it can assist in controlling nuisance algae growth.

Description:

Common Name: Pitho Crab

Scientific Name: Pitho mirabilis

Family: Epialtidae

Size: Up to 1.5 inches (3.8 cm)

Temperament: Peaceful

Difficulty: Easy

Reef Safe: With caution

Native Region:

Found in the shallow tropical waters of the Western Atlantic and Caribbean, typically among live rock and coral rubble.

Aquarium Setup:

Tank Size: Minimum of 10 gallons

Temperature: 74–80°F (23–27°C)

pH: 8.0–8.4

Salinity: 1.023–1.025

Substrate: Live rock for grazing and hiding; performs best in mature reef tanks with established microalgae.

Additional Tips:

• Algae Control: Consumes film algae and detritus, helping maintain a cleaner tank environment.

• Camouflage: May decorate itself with bits of algae or sponge, making it blend into its surroundings.

• Compatibility: Generally peaceful but should be monitored around small polyps and fleshy corals.

• Diet: Primarily herbivorous; supplement with algae wafers or dried seaweed if natural food is scarce.