Pteraspis

The last for a while of all these devonian fish. At least until I get back to the subject...

Incidentally, it was hard trying to track down useful reference for contemporary seaweed species. I took a guess, but too wild a guess.

Groenlandaspis.

Another of the Devonian armoured fish genus, this one swimming in amongst a drowned forest.

A lot smaller in life than it might look here.

It's sometimes hard to think of a scale that won't be a wild anachronism.

Drepanaspis.

Placoderm, the Devonian armoured fish.

Paleoart - cephalaspis

Two cephalaspis making their way towards something under the sand... warm, clear tropical waters.