Arrowhead Crab (Stenorhynchus seticornis)
The Arrowhead Crab (Stenorhynchus seticornis), also commonly known as the Arrow Crab, is a fascinating and unusual marine invertebrate recognised for its long, slender legs and distinctive triangular, arrow-shaped body. With its striking appearance and active nature, this crab adds both character and interest to a marine aquarium.
 
Appearance & Behaviour
Arrowhead Crabs have extremely long, delicate legs and a narrow body that allows them to move easily through rockwork and crevices. Their unique shape and slow, deliberate movements make them a captivating species to observe as they explore the aquarium in search of food.
 
These crabs are natural scavengers and will consume detritus, leftover food and small unwanted organisms within the aquarium, helping contribute to overall tank cleanliness.
 
Care & Compatibility
Stenorhynchus seticornis thrive in stable marine aquariums with plenty of rockwork where they can climb, hide and forage. While generally peaceful, they can occasionally prey on very small invertebrates or worms, so they are best suited to reef systems where tank mates are appropriately sized.
 
Providing adequate space and a varied diet helps maintain their health and natural behaviour.
 
Key Features
• Distinctive arrow-shaped body and long legs
• Active scavenger within the aquarium
• Interesting and unique addition to marine systems
• Thrives in established marine aquariums with rockwork
 
Summary
With its striking appearance and unusual body shape, the Arrowhead Crab is a unique and intriguing addition to marine aquariums, adding both functionality and visual interest to the reef environment.