Planet of The Ticks

There are many seed world concepts in speculative biology projects. Serina is a world populated by guppies and canaries introduced from Earth. Kaimere is populated by many Earth lineages introduced over long periods of time. Much more exotic, the Mammalian Ectoparasite Seed World (MESW) by Twisting Depths is a world of ticks, mites, fleas, flies, and lice. Some have grown to monster sizes and include cuddly blade-faced predators, grass-eaters, and shark-like organisms. Check them out.