Hairy Hermit Crab

Hairy Hermit Crabs are named for the dense, bristle-like hairs covering their legs, which likely help disguise their outline against algae-covered rock the same way a ghillie suit breaks up a silhouette. Like every hermit crab, they're opportunistic scavengers that clean up leftover food and nuisance algae, and they'll periodically need a larger shell as they grow, which means keeping a few appropriately sized spares in the tank so they're not tempted to evict a snail out of its own shell to solve the problem themselves. Hardy, low-maintenance, and genuinely useful cleanup crew once that one housing detail is covered.