The film's opening credits roll doesn't start until about ten minutes into the movie.
The film features one Oscar (Academy Award) nominee - Karen Black - and two Golden Globe Award nominees - Lee Majors and Marisa Berenson - and one Golden Globe Award winner - Karen Black, who won two gongs.
Many information sources such as reviews and catalogs state the film's date as being 1978 not 1979. A title card in the opening credits clearly gives the copyright date as 1978. But the picture was not actually first released until 1979. Such information sources can also spell the title differently as well, as one word as with 'Killerfish', or with two words as with 'Killer Fish'.
The movie had three working titles - ''Greed'', ''The Naked Sun'' and ''Deadly Treasure of the Piranha'' before finally settling on ''Killer Fish''. Many promotional materials including movie posters and home video covers though spelled this title as the one word ''Killerfish''.
This is one of several movies made in the mid-to-late 1970s and 1980s after the box-office success of Jaws (1975). Other films include: Jaws 2 (1978), Jaws 3-D (1983), Jaws: The Revenge (1987) Orca (1977), Piranha (1978), Tentacles (1977), Killer Fish (1979), Barracuda (1978), Tintorera: Killer Shark (1977), Blood Beach (1980), Piranha II: The Spawning (1982), The Last Shark (1981), Up from the Depths (1979), Humanoids from the Deep (1980), The Island of the Fishmen (1979), Devil Fish (1984), and Mako: The Jaws of Death (1976).