21Aye-ayes
Aye-ayes can be found only on the island of Madagascar. These rare animals are related to chimpanzees, apes, and humans.
22Monotropa uniflora
The Indian Pipe plant (Monotropa uniflora) is one of the rare plants which doesn't contain chlorophyll and thus doesn't photosynthesize, getting all its energy from fungi.
23Sarpa salpa
There is a species of fish named Sarpa salpa that can be hallucinogenic when eaten. The ancient Romans reportedly consumed it as a recreational drug.
24Marmorkrebs
A species of self-cloning crayfish named Marmorkrebs was discovered in the German pet trade in the 1990's. Every individual is female and genetically identical. There are no known natural populations.
25Bucardo
After the last bucardo - a wild goat species - died, scientists brought a clone to life, making the bucardo the first species to become de-extinct. The clone died after 7 minutes, also making it the first species to go extinct twice.