Seal in a mullet? Now THAT would be something to see...
Seals? Mullets?
Scotland!
The river bed is home to marine worms, bivalves and larvae. These are fed on by fish, flounders, mullet and eels, which in turn are eaten by cormorant, herons and seals.
http://www.glasgow.gov.uk/en/Residents/Environment/TidalWeir/tidalweirwildlife.htm