what is this?! nudibranch?

[euphoricgear]

http://i152.photobucket.com/albums/s172/euphoricgear/DSC00457.jpg

http://i152.photobucket.com/albums/s172/euphoricgear/DSC00455.jpg

should i put them in my main tank? are they reef safe?

thanks

[bertoni]

That does look like a nudibranch, but the picture is pretty blurry. Nudibranchs are all predatory. This one will likely just starve to death, but might take some corals with it.