Arrow Crab

The arrow crab is instantly recognisable by its elongated, triangular body and extraordinarily long, spindly legs—a silhouette that explains its common name. Found on rocky and coral reef substrates, usually in 5–40 metres of water, it uses those needle-like legs to probe crevices for small crustaceans and other invertebrates. Arrow crabs are solitary and cryptic, often wedged into gaps; look carefully around reef walls and boulders early in the morning or late afternoon when they are most active.