Weird things growing in my Tank!! Help!!

[Aleiva16]

Hello all,

I have attached some pictures of some weird things growing in my tank. I have a star like creature and in my sand bed I have a few mounds with orange long legs coming out of it, but no body. Please help with any insight. I also have video of these things, but I do not know how to convert it and upload on here.

History of the tank.
The tank will make 2 years this July. It is a 65g tank with 2 clowns, 1 anthias, 1 royal gamma, 2 cardinals and quite a few corals. (picture attached)

Please Help!!

Thank you in advance.

 

[G_Sanab922]

Can't see your attachments

 

[sjfishguy]

Can't see attachment either, but ong tentacles out of the mounds sound like spaghetti worms. Try to google it.

 

[rovster]

Spaghetti worm. The other is a brittle star. Both are harmless.