Cichlids are fish from the family Cichlidae in the order Perciformes. Cichlids are members of the Labroidei group, as are wrasses, damselfishes, and surfperches.

David R. Bellwood has written:

'A phylogenetic study of the parrotfishes family Scaridae (Pisces: Labroidei), with a revision of genera' -- subject(s): Classification, Parrotfishes, Phylogeny

Scott W. Michael has written:

'Reef Fishes Volume 1'

'A PocketExpert Guide to Reef Aquarium Fishes'

'Reef aquarium fishes' -- subject(s): Coral reef animals, Marine aquarium fishes, Marine aquariums

'Wrasses & parrotfishes' -- subject(s): Wrasses, Parrotfishes, Marine aquarium fishes

Wrasses are fish...so they swim.

Yes they have scales.