To answer your question accurately, I need to know which specific red fish you're asking about.
For example:
* Red Snapper: Named for its distinctive red color and snapping jaws.
* Red Drum: Named for the drumming sound it makes with its swim bladder.
* Red Grouper: Named for its red coloration and its common habitat in grouper species.
Let me know the specific red fish you're interested in, and I can tell you more about its naming origin!