:  The Scorpionfishes
Taxonomy: Scorpaeniformes, Scorpionfishes  (Scorpaenidae)
General Information: The scorpionfishes include over 385 species in 45 genera. The most venomous fishes in the sea are in this group - the stonefishes.
Diet: They are carnivores - worms, fish, crustaceans ,etc.
Final Note: Lionfishes have numerous spines on their fins and operculum. They have venom glands on their fins which carry very potent toxin. There may or may not be scales.

Examples at SeaScape Studio:
Clearfin Lionfish
FuManchu Lionfish
Fuzzy Dwarf Lionfish
Gold Leaf Fish
Sea Goblin