Slug thing?

[Starliah1111]

Hi, was wondering if you guys can tell me what this white slug thing is. It's laid 2 lots of eggs in 2 days... Looks much the same from the front but almost impossible to get a picture of...

 

[Dburr1014]

Nudibranch.
To many to ID.
I wouldn't want that in my system unless I new exactly what it was.

 

[Troylee]

Looks like a poly clad worm! Possibly the euphillia eating one.. bad news all around regardless.. toss it! Scrape all the eggs off the best you can into a cup or something.. you def don’t want those in your tank.