Shanny in the hand

Shanny in the hand

Observation - Shanny in the hand - UK and Ireland. Description: Commonly waiting for the tide to return. Most stones near the bottom-most tide line will reveal this

Commonly waiting for the tide to return. Most stones near the bottom-most tide line will reveal this or a Butterfish.
They are best identified in water and a glass jar may be best but is not a good thing to carry (perhaps drop) at the seaside.
It's best IDd from the thick pale lips and pretty large pectoral fins.
Handle carefully as they bite, bless them.