The green squarefish (Vircanti Verduligrun) is a flat species of duopeskie that evolved from the backstroker. Green squarefishes uses their flat bodies to bottom feed on small sand dwellers. They are mostly predated by sandwraiths, with their tiny size of 4 cm or 1.5 inches.
For people who don't know, just go and see the Southern Xenocarid project of @Halebopper