The northern clingfish (Gobiesox maeandricus) is common to the Pacific coast of North America. It's called a clingfish because it has a large sucker on the bottom of its body. This sucker can attach firmly to rough, slimy surfaces and withstand a lot of pressure.
Under the right conditions, a nothern clingfish can pull 150 times its own bodyweight. The sucker consists the pectoral and pelvic fins of the clingfish, which are fused together. They're roughly textured on the edges with microscopic hairs which provide friction between the fish and the object it's attached to.
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