A is for the Andorians. They have four sexes.
B is for the Regulan Bloodworms, I don't know if they even have sexes.
C is for the Cardassians. Damar is one of them.
D is for the Trellium D. It's only useful in the Expanse otherwise it's not worth the expense.
E is for Chekhov's Ear Bug, compliments of Kahn.
F is "For The Cause" a really good DS9 episode where Sisko discovers that his girlfriend works with the Maquis.
G is for Garrulous Gowron.
H is for the Husnock, a species of hideous intelligence.
I is for Holographic Talking Iguanas.
J is for Jim. Your name... is Jim.
K is for Klaang, A Klingon sometimes seen with Kuu and Kluux...
L is for Lal, Data's baby girl.