Aliens going towards the light

[elysics]

Usually I'm the one giving answers here, but W T F

They are coming out of the ground from a single point and branching upwards, they react to touch

Needs some slithering sounds and disturbing horror music

 

[SlugSnorter]

Don't remember the name, but harmless algae (maybe bacteria?). It will not harm anything, its just looking for light/nutrients.

 

[elysics]

Don't remember the name, but harmless algae (maybe bacteria?). It will not harm anything, its just looking for light/nutrients.

It's definitely not algae, did you watch the video?

It's hundreds of individual moving worm-like creatures, if I touch them they try to evade

 

[SlugSnorter]

It's definitely not algae, did you watch the video?

It's hundreds of individual moving worm-like creatures, if I touch them they try to evade

Might be a colony of harmless detritus worms.

 

[Cthulukelele]

Idk what it is, but it's terrifying in a way that makes me jealous and want to see them in my tank. That's some scifi stuff

 

[ISpeakForTheSeas]

Labyrinthula (though I haven’t researched this enough yet to verify if it actually is Labyrinthula or just worms that look like Labyrinthula). The consensus seems to be that it’s harmless unless you’re trying to keep seagrasses.

Here are some threads dealing with them (some more similar to yours than others):
https://www.reef2reef.com/threads/what-is-this-vein-like-growth-on-my-glass.366876/https://www.reef2reef.com/threads/worm-and-weird-growth.409967/https://www.reef2reef.com/threads/new-hitchhikers.418898/https://www.reef2reef.com/threads/sudden-single-spidery-algae-monster.892381/https://www.reef2reef.com/threads/id-and-help-please.866458/https://www.reef2reef.com/threads/anyone-ever-see-something-like-this.891481/https://www.reef2reef.com/threads/omg-what-is-this-in-my-tank.945271/

 

[KrisReef]

Usually I'm the one giving answers here, but W T F

They are coming out of the ground from a single point and branching upwards, they react to touch

Needs some slithering sounds and disturbing horror music

I hoped to never see this again, but I think this is my ex-wifes family reunion. It is truly horrible.

 

[EeyoreIsMySpiritAnimal]

Labyrinthula (though I haven’t researched this enough yet to verify if it actually is Labyrinthula or just worms that look like Labyrinthula). The consensus seems to be that it’s harmless unless you’re trying to keep seagrasses.

Here are some threads dealing with them (some more similar to yours than others):
https://www.reef2reef.com/threads/what-is-this-vein-like-growth-on-my-glass.366876/https://www.reef2reef.com/threads/worm-and-weird-growth.409967/https://www.reef2reef.com/threads/new-hitchhikers.418898/https://www.reef2reef.com/threads/sudden-single-spidery-algae-monster.892381/https://www.reef2reef.com/threads/id-and-help-please.866458/https://www.reef2reef.com/threads/anyone-ever-see-something-like-this.891481/https://www.reef2reef.com/threads/omg-what-is-this-in-my-tank.945271/

Thanks! I was going to try to find all these threads, lol

 

[elysics]

Yeah seems to be what it is, I don't mind them eating algae, have mainly dictyota in my tank

Maybe have to revise the aliens theme though, Wikipedia says the tracks they are moving on are an "ectoplasmic net" lol

Ghost worms in my tank

 

[olonmv]

Yeah seems to be what it is, I don't mind them eating algae, have mainly dictyota in my tank

Maybe have to revise the aliens theme though, Wikipedia says the tracks they are moving on are an "ectoplasmic net" lol

Ghost worms in my tank