Tompot blenny
Parablennius gattorugine · Small fish and rockpool species
Also called blenny, tompot

The largest British blenny, living in rocky crevices in shallow seas on southern and western coasts. Small ones turn up in rockpools.[1]
How to recognise it
When and where
Listed as present all year round.[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.