Streams of cold fresh water from the chalk hills flow from the shingle beach, and this had confused an eel that was trying to swim inland.
It's not easy to pick up an eel, by the way.
Browsing the usual Wiki-thing, I see that European eels are declining because of environmental factors, overconsumption and the introduction of parasites from farming stocks [that oft-repeated litany - sigh] and that IUCN have included them in their Red list.
From a personal point of view, I find their taste when jellied to be quite revolting and they may be reassured that I shall never touch them again.
..... and small dogfish dashed; whelks and winkles wandered, while sea anemones ...um... angled for food?
Lovely evening. Do not take living by the sea for granted.