Dopterians are physiologically similar to Ferengi, and most of the Dopterians encountered have been criminally-inclined (thieves, pickpockets, and even a co-conspirator with Lursa and Bator).
The Chandir are a species that has been seen often on Deep Space Nine, but not named in the series. They are sometimes referred to
Welcome to an alien species supplemental for the Mission Compendium: Hurricane by ELH. This is a write-up of a species from a mission in the compendium,
The Oran’taku is a species introduced in the Star Trek: Enterprise episode, “Rajiin“, where they encountered an Oran’taku spy tasked by the Xindi to steal biometric data.
The Cairn are a very advanced telepathic species who have lost the ability to communicate verbally. They send telepathic images instead of words, which allows
The Axanar are one of the first species encountered by Earth Starfleet, in the Star Trek: Enterprise episode, “Fight or Flight“. The first Axanar they encounter