Lawnmower blenny sunken belly.

[Now3]

Hey guys. I got this lawnmower blenny around two weeks ago. He ate the majority of the algae on my glass and still picks at it. There is a ton on the rocks.

I noticed his belly is pinched in. Attaching an image of him from today.

I have tried so many foods. Pellets which he spits out and leaves, jumbo mysis which he will nibble on but not really eat. Nori which he has absolutely 0 interest in, and sinking herbivore pellets which he nibbled on once and now ignores.

What do I do?

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[Now3]

Bump.

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[Now3]

Bump. He is picking at empty spots on the glass, not the algae spots. I think I got a retarded one.

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[ThePurple12]

That's why lawnmower blennies aren't recommended for most tanks. Mine doesn't eat anything I try to feed it, but my 125 has plenty of algae to sustain it. Hopefully yours will fatten up, but it won't happen quickly.