The flounder is a flatfish and normally a dull brown or greenish-brown on its upper side and occasionally faint red spots can be found. The underside is opaque and a dull white although brownish discolouration is not unusual.
The turbot is a wide bodied flatfish with the eyes on the left side of its head. The body is without scales but there are boney tubercles on it although these are sometimes only on the underside.
The brill is a close relative of the turbot which it resembles however its body is scaled and lacks the boney protuberances. The first rays of the dorsal fin are free from membranes in their upper half.
The rock cook is a small deep-bodied wrasse with thick lips on a small mouth, it’s also known as the small mouth wrasse. The mouth extends to less than half the distance to the eye.