Mail-cheeked fishes

Order Scorpaeniformes (Class Actinopterygii, Phylum Chordata).

Lionfishes and Scorpionfishes (family Scorpaenidae), Flying Gurnards (Dactyloapteridae), Flatheads (Platycephalidae), and Stonefishes (Cynanceiidae) are all ugly-looking members of the order Scorpaeniformes.