19/06/2026
A large male spider crab (Maja brachydactyla) out in the seagrass a few weeks back! The arrival of these large crabs in spring and early summer is such a markable event in the seasonal calendar of our seas. Driven by an instinct to mate and moult in shallow water, these crabs will march up to 100 miles inshore.
With the June summer solstice nearly here, the peak of the migration this year has definitely been and gone now, and over the next few weeks and months many of these larger wanderers will begin to hike back into the deep. With a lifespan of 8 years, this could be the 5th, 6th or 7th time this male has marched.