The Intertidal Zone

The Intertidal Zone is a poorly-received show airing from 1993-96 that replaced Rocko’s Modern Life in The Rockoless Universe. It was so bad, Thomas Kenny quit acting and Stephen Hillenburg rebooted it as SpongeBob SquarePants in 1999.

Premise
It was most likely an adaptation of Stephen Hillenburg's comic series, but this is unconfirmed.

Trivia

 * It may have featured the same cast and creative team as Rocko's Modern Life, but it probably didn't, which led it to fail.