Stenopus
Stenopus is a genus of marine decapod crustaceans commonly known as “banded coral shrimp” or “harlequin shrimp“. They are known for their striking coloration, consisting of alternating bands of white, orange, and black. These shrimp are popular additions to marine aquariums, but their carnivorous nature and ability to grow quite large make them unsuitable for reef tanks.
Characteristics
Stenopus shrimps are characterized by their elongated bodies with a distinctive rostrum, which is a pointed extension of the carapace (the shell covering the head and thorax). Their bodies are laterally compressed, meaning they are flattened from side to side, which helps them to maneuver through coral reefs. They have five pairs of walking legs, with the first pair being modified into large, strong claws. The second pair of legs are also modified into smaller claws, and the remaining three pairs are used for walking. They are also distinguished by their long, whip-like antennae that are used for sensing their surroundings.
Environment
Stenopus species inhabit tropical and subtropical coral reefs, particularly in the Indo-Pacific region. They are often found in crevices and under rocks, where they can hide from predators. They are also frequently observed near anemones, with which they have a symbiotic relationship.
Diet
Stenopus shrimps are carnivorous and feed on a variety of invertebrates, including small fish, worms, and other crustaceans. They have a fascinating feeding behavior, using their large claws to crack open shells and extract the meat. Their diet often includes starfish, a surprising delicacy that they are capable of consuming.
Symbiosis
Stenopus shrimps have a symbiotic relationship with certain anemones. The anemones provide the shrimp with protection from predators, while the shrimp help to clean the anemones and keep them free of parasites. This relationship is mutually beneficial, as both organisms benefit from the association.