Cheiracanthus (from Greek: χείρ kheír, 'hand' and Greek: ἄκανθα akantha, 'spine')[1] is an extinct genus of a group of fish called Acanthodii (or "spiny sharks").

It had a blunt head, upturned tail, and fins protected by spines.

Cheiracanthus swam at mid-depth in lakes and rivers, seizing small prey in its gaping jaws.

Whole fossils of this fish occur only in Mid-Devonian rocks in Scotland, but its distinctive small, ornamented scales crop up around the world, as far south as Antarctica.

You can help Wikipedia by expanding it.This article related to a Devonian fish is a stub.