uhm... for the january first answer:
There is the Hydra. Which is a genus of simple cnidarean polyps. They are related to Jellyfish and sea anenomes and nearly microscopic. Obviosuly they are named after the Lernaean Hydra with its multiple snake heads slain by Hercules.
And before you say Genus isnt a species. When we talk about Gorillas we are generally refering to both species of Gorilla. As in both eastern and western gorillas. And they fall under the same genus(Gorilla)
Funnily there are two types of cnidarean, Polyps(which hydra and anemones are) and Medusas (which jellyfish are.)
Here is a picture of a hydra
Here is a picture of THE Hydra
Picture of THE Hydra
There are also sphinx moths but they are also refered to as hawk moths so I wont go into detail about them