Pleuronectiformes

Pleuronectiformes: Adults not bilaterally symmetrical, with one eye migrating to the other side of the cranium; dorsal and anal fins with long bases, dorsal fin base overlapping at least the neurocranium except in Psettodes; body highly compressed, somewhat rounded on eyed side and flat on blind side; eyes can protrude above body surface allowing fish to see when buried in the substrate; usually six or seven branchiostegal rays, rarely eight; body cavity small; adults almost always without swim bladder; scales cycloid, ctenoid, or tuberculate. About four species probably occur in freshwater, while another 20 species that are normally marine occasionally enter freshwater.
 * See Fishbase.

Families in this order:
 * Achiridae
 * Achiropsettidae
 * Bothidae
 * Citharidae
 * Cynoglossidae
 * Paralichthyidae
 * Pleuronectidae
 * Psettodidae
 * Samaridae
 * Scophthalmidae
 * Soleidae