Rock Goby Gobius paganellus

The Rock Goby is native to coasts and rockpools of the northeastern Atlantic from Scotland to Senegal, including the Mediterranean and Black Seas.

It grows to 12cm long. It has cryptic camouflage against the rocks but is often left behind in tidal rock pools and is easy to pick out with its dark and white barred pattern.

It can also be found in brackish and even fresh waters. When breeding, the male invites the female to lay eggs under a rock or shell which he will then guard until the eggs hatch.