Sorry just saw this, yeah Sealab 2021. Was on adult swim in 2000 - 2001. They took a Hanna Barbera cartoon called Sealab from the 70s cut it up and made episodes out of it. Extremely stupid/ dry humor, every episode something happend and they all get killed. It’s worth a watch, episodes are really short.

Here’s a clip. It’s a spoof from the end of Apocalypse Now: https://youtu.be/PL23meWoB9k?si=pWxkJO0ewq0NFB7S

Sea Lab 2021.