Was it 1-1/2 foot long or 4 feet long?
Did it have a white lip or white chin and bib?
Here’s how big an Otter (with eel) looks on a mobile phone @ around 10m.
Probably because the summer days are so long and the winter days so short but they are certainly not shy around here. Last winter I was putting food out for one when the loch was froze over, I was standing in front of the hide looking at the Otter tracks on the ice when she came out of the reeds to around 10 m thought twice and went back into the reeds.
If you read through the log book in the bird hide its probably seen every day diving or eating fish, eels or fresh water snails. There was a dead Cormorant at the edge of the loch that Mr. G turned over to look for a ring the next day the whole breast was eaten out.
The ones at the Highland Wildlife Park get steak the lucky fishers.