Forktail Blennies are attractive and striking marine fish. Known for their split-fin tail which resembles a fork, they have two longer external spines with five shorter ones in between. One imagines that these put off many would-be predators. Like other Blennies, these too are pretty and cute little sea creatures, full of character. Forktail Blennies spend most of their time hopping from rock to rock, grazing on algae, quietly going about their business. Growing up to 13cm, these need to be kept an aquarium at least 120 litres in capacity. Keep with other fish that are not too big or likely to eat them and feed a mix of small live and frozen marine foods.