Description
The Arrowhead Crab, also known as the Arrow Crab or Spider Crab, belongs to the genus Stenorhynchus.
Here's a description:
The Arrowhead Crab is named for its triangular-shaped body, resembling an arrowhead, and its long, spindly legs, which give it a spider-like appearance. These crabs typically have a brownish or reddish coloration with lighter markings. They are relatively small, with a body size ranging from 1 to 2 inches (2.5 to 5 centimeters) and leg spans of up to 4 inches (10 centimeters) in captivity.
In the wild, Arrowhead Crabs inhabit rocky or coral reef environments in tropical and subtropical waters of the Western Atlantic Ocean, including the Caribbean Sea and the Gulf of Mexico. They are primarily nocturnal creatures, hiding among crevices and caves during the day and emerging at night to forage for food.
Arrowhead Crabs are omnivorous scavengers, feeding on a variety of small invertebrates, algae, detritus, and organic matter. In captivity, they require a well-established aquarium with plenty of hiding spots and crevices to explore. They are generally peaceful and can be kept with a variety of tank mates, although they may prey on small ornamental shrimp or other small invertebrates.
These crabs are known for their active and curious behavior, often exploring every nook and cranny of the aquarium. They are excellent climbers and may occasionally attempt to escape from the tank, so it's essential to have a secure lid in place.
Overall, the Arrowhead Crab is valued for its unique appearance, interesting behavior, and ability to help control algae and detritus within the aquarium. However, they may not be suitable for all reef aquariums, particularly those with small or delicate tank mates that could become prey.