Scary Critters in my tank!

[IndianaReef]

So my tank has been cycling for about a week and a half with live rock (added a small sea cucumber and some small hermit crabs), however a few things have begun to appear. From wothin my live rock (like genuinely inside) a long white creature (either a worm I think or some kind of tentancle) emerged from the rock, and started shooting white debris into the tank. It then returned to the rock but leves (im assuming its anus) slightly out of the rockwork. Additionally I am seeing what looks to be the beginnings of an Aptasia infestation as some small polyps have begun to sprout up. I am considering buying a peppermint shrimp to deal with the aiptasia, but need more advice (on the white creature too). Finally, a creature that looks like the eye and eye stem of a giant snail (its some kind of plant) is emerging and im not sure if this is a concern. Sorry for so many things at once im just kind of freaking out hahaha. Thanks to anyone that can help.

 

[TriggerFinger]

Hi @IndianaReef
Pictures with white light would help.

 

[El_Guapo13]

Got any pics of these critters?

 

[NashobaTek]

Welcome to the team!

 

[IndianaReef]

Hi @IndianaReef
Pictures with white light would help.

 

[G Santana]

Welcome to R2R
Sorry I can't tell what that critter is.

 

[PTXReef]

A bit tough to see but try searching up peanut worms or spaghetti worms to see if they look similar? It sucks that it's so hard to see even with good quality phones/cameras. The last photo looks like small feather dusters on the left and potentially aiptasia on the right. Maybe try a video to see if it'll improve the quality?

 

[Seaspirit]

You can look up description of aptasia (I’m a newbie so I did), they have very specific arrangement of long tentacles and short tentacles. I had some start growing from a live rock from LFS - thankfully it’s in my 10 gallon nano quarantine tank and easily removed. I also coral dip nearly everything (even if it isn’t coral) just to bring the critters out where I can identify them before anything goes in my tank. Said no thanks to a bristle worm once already.

 

[IndianaReef]

So my tank has been cycling for about a week and a half with live rock (added a small sea cucumber and some small hermit crabs), however a few things have begun to appear. From wothin my live rock (like genuinely inside) a long white creature (either a worm I think or some kind of tentancle) emerged from the rock, and started shooting white debris into the tank. It then returned to the rock but leves (im assuming its anus) slightly out of the rockwork. Additionally I am seeing what looks to be the beginnings of an Aptasia infestation as some small polyps have begun to sprout up. I am considering buying a peppermint shrimp to deal with the aiptasia, but need more advice (on the white creature too). Finally, a creature that looks like the eye and eye stem of a giant snail (its some kind of plant) is emerging and im not sure if this is a concern. Sorry for so many things at once im just kind of freaking out hahaha. Thanks to anyone that can help.

thanks heaps. additionally is this guy a problem?