- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
Alien fish that bear a resemblance to terrestrial angelfish, except for the bright halo of multicolored light they emit. Because halo fish lose their colorful illumination in response to any change in their environment, they provided one of the first clues that every living thing aboard the U.S.S. Enterprise had begun to shrink on stardate 5577.3 (2269).