Being mainly an ambush predator, the Long-spined Sea Scorpion, Taurulus bubalis, spends much of its time stationary on the bottom. It can match its colour to its surroundings, adopt an infinite range of mottling and wait for some unsuspecting fish, shrimp or other item to pass by which is then snatched instantly into its large, gaping mouth. Usually up to 15cms, this is a shallow water fish which is often found in rock pools or even amongst damp weed out of water.
A small barbel projects from each corner of the mouth and is fairly easy to see. This distinguishes it from its relative, the Short-spined Sea Scorpion, which has no barbels (see next photograph)
St. Abbs Marine Reserve, North Sea