A bizarre mix of lobster and crab, the spiny squat lobster is one of the true showstoppers of the rocky shore. With its long, flattened body and tail tucked neatly underneath, it looks like a tiny lobster curled in half. Growing up to 10cm long (including the tail), this fascinating crustacean may be small, but it certainly makes an impression.
This species is especially eye-catching, with a vivid red body decorated in electric blue stripes across its shell and around its eyes. Two long, chunky red claws stretch out in front, covered in thick brown hairs that give it its “spiny” name. Like many crustaceans, it can flick its tail like a paddle to dart backwards in a flash if startled.
Spiny squat lobsters live among rocky habitats and are fairly common around the UK, as well as the North East Atlantic, Mediterranean and Red Seas. They are most likely to be seen between April and October, and are often more active at night, when they venture out from rocky crevices to scavenge for food.
If you’re lucky enough to spot one while rock pooling, remember to follow the Seashore Code — tread carefully, gently replace any rocks you lift, and always return wildlife to exactly where you found it.
Habitat
Rocky shore, wrecks, reefs, rocky caves
Depth
0-600
Food
Filter feeding on plankton, detritus, smaller crustacea, molluscs, gastropods and small fish
Length
10 cm max.
Lifespan
8 years
Conservation Status
Not Evaluated (NE)
