Carcinus maenas
4cm
0-200m
2244 sites
Carcinidae
Keep an eye out for the European Green Crab (Carcinus maenas) while exploring shallow coastal waters! Though you might not see them on dedicated dive sites (they're more of a shore-dwelling critter), these small but mighty crustaceans are a common sight in estuaries and along rocky coastlines. While they might not be the star of a dive, spotting one is a sign of a vibrant ecosystem. These adaptable crabs are known for their voracious appetites and ability to thrive in a variety of habitats, making them a significant, if sometimes unwelcome, part of the marine environment. While not typically found on deeper dives, snorkelers often encounter them scurrying amongst the seaweed and rocks in intertidal zones. They're a reminder that even the smallest creatures play a vital role in the ocean's delicate balance. With a diver appeal score of 4/5, it's clear these little guys have a certain charm!
The European Green Crab is typically around 4cm, but can grow up to 6cm. Look for a broad, toothed carapace (shell) that is generally green, though it can also be yellow, orange, or even reddish. They have five pairs of legs, the front pair ending in small claws. Their most distinctive feature is the five teeth or spines along the edge of each eye.
