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'Brachyistius frenatus, the Kelp perch, is a species of surfperch native to the eastern Pacific Ocean from British Columbia, Canada to Baja California, Mexico where it is found in kelp forests down to a depth of about 30 metres (98 ft). This fish is also known to be a cleaner fish. This species can reach a length of 22 centimetres (8.7 in) TL. It can also be found on display at public aquariums.