He likes to introduce himself as "Realistic Fish Head," in place of a real name. His name is said to be Johnny in the video game Battle for Bikini Bottom, where he is the announcer for the main boss fights. In "The Great Patty Caper," his name is given as Elaine. In "Toonz2Nite" bumpers for the UK Nicktoons channel, his nameplate reads "T. McTrout" instead, and he is called "T. McTrout of Trout TV News." In SpongeBob's Nicktoon Summer Splash, SpongeBob and Patrick introduce him as "Mister Fish" several times.
In addition to announcing events in Bikini Bottom, the Realistic Fish Head also serves as a news anchor for the Bikini Bottom News. Most of the news reports he gives are about disasters in the town, such as in "Wormy," where he warns the town about the "monster." He also appears in the episode "Safe Deposit Krabs," where he announces the opening of the Bank of Bikini Bottom Bank.
He also appears during the theme song, when the line "Then drop on the deck and flop like a fish" is sung.