You've got me thinking about fish. Or lack of fish! As a kid hanging around the Amble piers (or south jetty if you like) in the 70s, fish were very visible compared to today. Where have they all gone? Sprats - massive shoals swimming around the pier timbers; we used to catch loads for something to do. 'Poddlers', again visible swimming in and out of the timbers, these were large fish, not sure what the correct name is? coalfish? again easy to catch - never seen one for years. In the 'little shore' when the tide was in and looking over from the pier you could always see large flatties cruising about on the sandy bottom. Not a sausage there now.
Ragworms - we used to dig directly under the pier - thick black glutinous mud. Sewer pipe pumping out all sorts just a few metres away. The worms were as thick as your finger with a vicious pair of black mandibles that could give you one hell of a bite!
Sand eel shoals. Where have they gone? Used to get great boiling masses of them in the harbour and the 'triangle' being chased about by mackerel. Not seen any of that for years either.