Yellowline Arrow Crab (Stenorhynchus seticornis) – Complete Care Guide

General Information

The Yellowline Arrow Crab (Stenorhynchus seticornis) is a fascinating and unique addition to marine aquariums, known for its long, spindly legs and striking golden-yellow stripes along its body. This species is native to the tropical and subtropical waters of the Atlantic Ocean, including the Caribbean and Gulf of Mexico. Its unusual appearance and active behavior make it a popular choice among aquarists looking for something out of the ordinary.

This crab is often found in crevices and among coral reefs in the wild, where it uses its long legs to navigate complex structures. Its elongated rostrum and spider-like body give it an almost alien-like appearance, which is both captivating and slightly eerie. Despite its delicate look, the Yellowline Arrow Crab is relatively hardy and adaptable, making it suitable for experienced hobbyists and beginners alike.

Care

The Yellowline Arrow Crab thrives in well-established aquariums with plenty of live rock for hiding and climbing. It is a nocturnal species, often retreating to shaded areas during the day and becoming more active at night. Providing a tank with ample hiding spots and a natural reef-like environment will help it feel secure and exhibit natural behaviors.

This species is relatively easy to care for but requires stable water conditions and a peaceful tank environment. It can tolerate a range of water parameters but thrives in conditions that mimic its natural habitat. Regular water changes and good filtration are essential to maintain water quality.

Diet and Feeding

In the wild, the Yellowline Arrow Crab is an opportunistic feeder, consuming small invertebrates, detritus, and algae. In captivity, it readily accepts a variety of foods, including frozen or live brine shrimp, mysis shrimp, and finely chopped seafood. It may also scavenge leftover food from other tank inhabitants, helping to keep the aquarium clean.

Feed this crab a small amount of food every other day, ensuring it has enough to eat without overloading the tank with waste. Its diet can be supplemented with algae wafers or sinking pellets to ensure balanced nutrition.

Behavior and Compatibility

The Yellowline Arrow Crab is generally peaceful but can exhibit semi-aggressive tendencies, especially towards smaller invertebrates like ornamental shrimp. It is best housed with tank mates that are not easily intimidated or preyed upon. Avoid keeping it with very small or delicate species, as it may view them as food.

This crab is a solitary creature and does not require companionship. In fact, housing multiple individuals in the same tank can lead to territorial disputes. It is compatible with a wide range of reef-safe fish and invertebrates, provided they are not small enough to be considered prey.

Health and Common Issues

The Yellowline Arrow Crab is a hardy species but can be sensitive to sudden changes in water parameters. Maintaining stable salinity, temperature, and pH is crucial for its health. It is also prone to stress if housed with overly aggressive tank mates or in a tank with insufficient hiding spots.

When selecting a Yellowline Arrow Crab, look for active individuals with intact legs and a healthy, vibrant appearance. Avoid crabs that appear lethargic or have missing appendages, as these may indicate poor health or stress.

Habitat

In the wild, the Yellowline Arrow Crab inhabits coral reefs, rocky outcrops, and seagrass beds at depths ranging from shallow waters to around 30 meters. It prefers environments with plenty of crevices and hiding spots, which provide shelter from predators and strong currents. Replicating this environment in captivity will help the crab thrive.

Common name: Yellowline Arrow Crab