Crab

Or perhaps an alien space ship. 
The weather has been dreadful all day but the late evening has brightened, the rain has stopped and even a bit of blue sky appeared. 
Every summer at Glasgow Fair we escaped from the Island of Bute and stayed at Otter ferry on Loch Fyne.  My Mum took over the Post Office while the owners went to visit family. I spent hours at the end of the pier with a line and a bit of red wool catching crabs. When Mum called me in I put them all back ready to catch them again the next day.