Thresher shark
Alopias vulpinus · Sharks and dogfish
Also called thresher
A rare summer visitor to UK waters, usually well offshore and sometimes close to land. Unmistakable because of its huge tail.[1]
How to recognise it
When and where
Usually arrives in British waters in summer, when the seas are warmest.[1]
Sources
These notes are a draft: we gathered them from the sources above and are still checking them. We don't work out best times for this fish yet. The size rules come from the same checked byelaws as every other fish.