Finding a rare fossilized comb jelly reveals new gaps in the fossil record; Richard Cloutier, Christian Klug & Mike Lee; The Conversation

Fossilized comb jellies, or ctenophores, are rare because the creatures are almost completely soft-bodied. Rare fossil finds are helping us learn more about ancient animals and evolution.

Source: Finding a rare fossilized comb jelly reveals new gaps in the fossil record