The size is variable, many reaching six inches, and some up to 10 inches. Females may be dramatically smaller. The crabs' low health doesn't help much. Anemone ID and Arrow crab predation query 01/13/2008 Thank you for this wonderful service and for devoting your time and effort! Seasonal variation of water temperature and sunlight duration are considered as the most important variables determining the breeding period of arrow crabs. My Arrow Crab is great at picking up detritus. They are nocturnal, scavenging for food at night and hiding during the day. There is a positive relationship between fecundity and the size of the parental female. Behavior: Arrow crabs can be extremely territorial when threatened.

Different species inhabit different parts of the world. Climate majorly regulates the breeding period of the arrow crab. Japanese Spider Crab economic importance life cycle in Japan especially, Spider crabs are eaten quite often, but you will mostly see them in aquariums because of their impressive size. It is called the Arrow Crab because of the shape of the body and head. Decapods have 10 legs, eight for walking and two pincers (Chelipeds). Different species inhabit different parts of the world.

Different species … Arrow Crabs normally inhabit portions of the reef where small caves or crevices are plentiful.

If you’d like to keep an arrow crab in your aquarium, keep in mind that they can cause trouble in smaller tanks. I have seen it fighting with my Banded Coral Shrimp, actually nipping off part of the shrimp's long antennae with it's delicate blue claws before the shrimp retreated. It is called the Arrow Crab because of the shape of the body and head.

Females do stay smaller.


They normally inhabit portions of the reef usually associated with a small cave or crevice. The arrow crabs size allows it to be preyed a pound by bigger build that can ignore the attacks and gobble up the crab. The pointed rostrum (nose) is long and slender; eyes protrude on stalks. Because of that the crab hides in cracks till its dark. Full-grown, an adult Arrow crab’s shell (carapace width) is only around 3 cm long (a little bit more than half an inch). It has a long and narrow rostrum (up to 3 cm or ~1 inch) drawn out into a tapered point. Size: The carapace can reach lengths up to 2.4 inches (6 cm) and the legs can be more than three times its body length. The Arrow Crab has extremely long legs.
They normally inhabit portions of the reef usually associated with a small cave or crevice. The size is variable, many reaching six inches, and some up to 10 inches. Arrow crab (Stenorhynchus seticornis) aquarium. The legs are long but they are very brittle. It is called the Arrow Crab because of the shape of the body and head.

The size is variable, many reaching six inches, and some up to 10 inches. adaptation Female crabs carry the fertilized eggs attached to her abdominal appendages until

What makes the yellowline arrow crabs unusual is their long, spider-like legs, and and extremely pointed head. Brittle Edit. The Arrow Crab has extremely long legs. It is called the Arrow Crab because of the shape of the body and head. This gives the Arrow Crab a safe place to duck into if it feels threatened and also provides a safe place to sleep. Females may be dramaticall Given half a chance it will grab large pieces of frozen food and stash it. The Arrow Crab, also known as the Spider Crab, has extremely long legs. The yellowline arrow crab, on average, is 3 to 6 centimeters in length. Arrow crab Stenorhynchus seticornis . The yellowline arrow crab lives on coral reefs between depths of 10 and 30 feet (Humann 1992). The arrow crab can grow relatively large, with a leg span of around 8”; that’s about the size of an adult person’s hand. Care Level - Easy Temperament- Semi-aggressive Reef Safe - Yes Max Size - 6" The Arrow Crab, also known as the Spider Crab, has extremely long legs. The size is variable, many reaching six inches, and some up to 10 inches. The shrimp is about double the size of the arrow crab. Aquatic Biomes; reef; Physical Description. Females may be dramatically smaller. Description: Arrow crabs, also known as Yellow line arrow crabs, have extremely long spider-like legs with deep violet tips, a triangular-shaped body and an extremely pointed head. Females may be dramatically smaller. Their long and slender legs are often spotted or banded with orange or red.

Contributed by Terrence Pardoe. Males are larger than females.