What are these green spiky things in my tank?

[B&M]

Hello everyone

I need help...

I’m New to fish keeping and also to this website.
I have a 300l reef tank and recently I’ve been seeing
These tiny spiky things in my tank. I’m scared if they’re bad for the tank or if they’re eating my corals

It looks like a really cute snail, very tiny, green spikes , and it moves quite fast.
It’s so hard to take a picture of it I hope you can see it.
Thank ya

[Gingerlove05]

Hello and welcome
Unfortunately i dont know much about marine, but there are a couple of people here who have or have kept marines that might be able to help

[black ghost]

Some kind of nudibranch. I don’t know the species.

[Ricrhys]

Well that have one thing going for them and that's a cracking name, apparently meaning "naked gills".

[mikeyw64]

I'm reading this article and thinking " nah I wouldn't want those"

Nudibranchs can be just as hazardous dead as alive. Always treat them with respect if you find one in your tank and never touch one without gloves and/or tongs. Even a dead slug can give a powerful sting.

[PaulVerrall]

I'm reading this article and thinking " nah I wouldn't want those"

Nudibranchs can be just as hazardous dead as alive. Always treat them with respect if you find one in your tank and never touch one without gloves and/or tongs. Even a dead slug can give a powerful sting.

Wow

[Ricrhys]

https://www.practicalfishkeeping.co.uk/ ... eat-taboo/
The article in question. Not all bad... mostly bad.

[fr499y]

Looks like a zoa/gsp eating nudi

[Redpanda]

Ohhh and there was me panicking about finding bladder snail in my tank this is terrifying

[Gingerlove05]

Ohhh and there was me panicking about finding bladder snail in my tank this is terrifying

Try looking up bobbit worms