Common name: Electric Blue hermit crab

General information

The Blue Banded Hermit Crab, scientifically known as Calcinus elegans, is a small and colorful crustacean that is popular among reef aquarium enthusiasts. This species is known for its striking blue bands on its legs and the vibrant blue to purple coloration on its claws, which make it a visually appealing addition to any tank. They are not only admired for their beauty but also for their role in maintaining the cleanliness of the aquarium by scavenging for detritus and algae.

Care

Calcinus elegans is a hardy species that adapts well to life in captivity. They require a tank with plenty of live rock and a sandy substrate where they can forage for food and find suitable shells to inhabit. It's important to provide a variety of shell sizes for them to move into as they grow. They are omnivorous and will appreciate a diet that includes meaty foods, as well as algae-based foods.

Reproduction

In the wild, Blue Banded Hermit Crabs reproduce by releasing eggs and sperm into the water column, where fertilization occurs externally. In the aquarium, breeding is less common, but with optimal conditions, it is possible to observe larval stages. The larvae go through several planktonic stages before settling and metamorphosing into juvenile crabs.

Symbiosis

While Calcinus elegans does not have a specific symbiotic relationship like clownfish with anemones, they are often seen coexisting peacefully with a variety of tank mates. They can be part of a clean-up crew in a reef tank, living alongside corals and fish without causing harm.

Habitat

The Blue Banded Hermit Crab is native to the Indo-Pacific region, where it inhabits coral reefs and rocky shorelines. In the aquarium, they help recreate a piece of their natural ecosystem by contributing to the tank's biodiversity and helping to control algae growth.