Gethero

Gethero The Sturgeon or just Gethero is an orphan Sturgeon who tends to live alone in deep waters(which is not normal for Sturgeon's we think if you have a different answer for our theory comment below).

Meeting SpongeBob And Patrick
Just like in the "Trenchbillies" episode SpongeBob and Patrick fall in the far more treacherous deep waters of Bikini bottom there they explore an old sunken ship it is unknown how it came to be in those deep waters they find gold and all sorts of things until SpongeBob bumps into what at first seems like a "sea monster" but later revealed to be an orphan Sturgeon it is unknown what happened to Gethero's parents in the series some fans say they died or abandoned him Gethero later swims off frightened but they later meet up again in part 2 of the episode.

Trivia
Gethero is a spinoff of Urchin from The Little Mermaid The Animated Series