A is for Anticans. They eat live meat. B is for Benzites. Many of them required an artificial breather device in order to serve in the typical oxygen-nitrogen environments of most Starfleet vessels. C is for Ceti Eels. They like snuggling with human brains. D is for Denobulans, one of the earliest alien species encountered by humans from Earth. E is for Edith Keeler. Kirk fell hard for her. While she fell hard for a truck. F is for F-Class Shuttlecraft. During the mid 2260's, they were primarily used at starbases and aboard Constitution class star ships. G is for Galorndon Core.