Acanthodii (Taxonomic Rank: Class)
Extinct, ancestral shark relatives known as 'Spiny Sharks' due to the dentine spines that reinforced their fins.

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	Acanthodes Acanthodopsis Cheiracanthus Climatius Culmacanthus Diplacanthus Euthacanthus Gyracanthus Ischnacanthus Mesacanthus

= Extinct Life Forms   = Living Creatures   = Fictional Beasts   = Inanimate Objects   = Ethereal Entities    = At least one collectible is catalogued