As always, shallow warm seas were an ideal place for life. Vegetation consisted mainly of red and green algae. Despite the reduction in diversity after the greatest Permian–Triassic Extinction Event (PTME), stalked echinoderms soon formed dense underwater thickets again. Left without their competitors - the blastoids, the sea lilies (Crinoidea) (Encrinus, Holocrinus) took on an even more prominent role as a peculiar creator of ancient landscapes, providing habitats for other animals. Coral reefs, which also disappeared after the extinction, began to recover only at the end of the period.

The world of marine invertebrates, which was rich and diverse, was suddenly devastated after the mass extinction at the end of the Permian and the beginning of the Triassic periods. This can be compared to a plot from Marvel comics, where the supervillain Thanos snaps his fingers, and half of all living beings in the Universe instantly disappear. Likewise here, many creatures that lived in the Paleo...