Nudibranch in trouble

[OceanRidge]

Nudibranch doesnt look like its doin too well. Moved him from friends tank to mine to see if it would be better for him, as his is not full cycled. the mouth of the nudibranc is pushed out. any thoughts on what thi is?

[iCam]

Hey. Do you know what type of nudibranch it is? Most have very specialized diets, many of which are not known. Unfortunately, most nudibranch die in home aquariums.

On another note, it might have been overly stressed from being in a uncycled tank.

[OceanRidge]

I know what type of sponge it needs, however, to come by it seems impossible. Ive read on the seaslug forum about stuff called angel food, which its second largest ingredient is marine sponges. Anyone know of an online site that sells a variety of marine sponges?