Scientific Name: Stenorhynchus Seticornis
Reef Compatibility: With Caution
Minimum Tank Size: 40 gal
Max Size: 8 inches
Approximate Purchase Size: 3 to 5 inches
Notes: The Arrow Crab also known as the Spider Crab or the Yellow Lined
Spider Crab. The Arrow Crab has a small triangular shaped body with exceptionally
long legs that make it look like a spider. The colors of the Arrow Crab vary
from tan to brown with an iridescent blue stripe running horizontally down the
The Arrow Crab is found mostly in the rocky subtidal areas
of the Atlantic, Gulf of Mexico and Caribbean.
The diet of the Arrow Crabs consists of small invertebrates
in the wild and is commonly used in the marine aquarium hobby as a way of controlling
bristle worm populations. They have also been known to attack other invertebrates
including Coral Banded Shrimp and even some small fish. Arrow Crabs along with
most other crabs are opportunistic feeders.
The Arrow Crab is best housed alone or as a male/female pair as they are territorial.
The Arrow Crab has not been readily bred in captivity as of