Subnautica has some weird glitches, but the most random one I've stumbled upon to this day are the rockgrubs and the crashfish. I suggest you try it. Spawn a crashfish in creative and then a sizeable number of rockgrubs next to it. Watch what happens.
Oh, and there's also the dead eyeyes. Every fish goes limp when they're dead, but you can't exactly tell when an eyeye goes limp, can you? Well, except that. They get worse graphics. Their pupils even become square.
ALDNOAHRIS i was going to check that crashfish thing and when the game loaded in the lava zone was green. the lava was green. the ground was pitch black.
so u know. speaking of glitches. sometimes the lava zone becomes the lost river i guess.
BUT ANYWAYS. I DONT KNOW WHAT I WAS EXPECTING WITH THE CRASHFISH. BUT.
THE. THE ROCKGRUBS TREAT THE CRASHFISH AS A WALL. THEY ALL STICK TO IT. KABROWBRKWBR
[IMAGE ID: A series of screenshots from the game Subnautica.
IDS 1 & 2: Pictures of the Lava Lakes biome, a glitch turning the lava and surroundings green. A Sea Dragon is visible in the first picture, and a "waterfall" of lava is visible in the second.
IDS 3 & 4: Pictures of a Crashfish in the Grassy Platues biome, with numerous Rockgrubs surrounding and attached to it. In the second picture, a group of Biters are attacking the Rockgrubs, yellow blood splashing on the screen behind the Crashfish. /END ID.]