Snaiad is, if you haven't already heard, the intellectual creation of DA artist Nemo Ramjet, a world where limbs are hydralic and the eyes and mouth don't always share a neck.

Recently, Nemo gave me permission to illustrate some of the more distant relatives of the present lords of Snaiad. The two worm-like ones are greatly magnified (see the stick figures? that's them, life-sized), and were picked up in the coastal habitats that they've managed to eke out a living in.

If these two species are any hint as to the origins of the limb layout of the two related vertabrate clades on Snaiad, then the Radiobrachs (arms evenly-spaced around the body) had their start crawling through sand and mud....whereas the other clade (the one which eventually dominated the land & then returned to lord it over the sea as well) developed paired limbs to assist with crawling between rocks and boulders. Wouldn't asymetrically-arrayed legs have been better suited for such a thing? Doesn't matter -- evolution never starts from scratch, not even on an alien world.

The third creature depicted here, is one of the few surviving Radiobrachs in the modern Snaiad oceans. Like ninety percent of all radiobrachs, Hyperthermos bayezidii has limbs which operate on a pneumatic principle -- they are flat paddles as they push water behind them, and they thicken as they return to the forefront. The seizing arm extends to impale its prey, the arm reaching at the same time that the mouth opens wide.