Orange spotted blenny

[Austriaguy]

I have recently acquired an orange spotted blenny from my lfs. They said that he is a herbivore, and my research is saying the same. I have offered him fresh macroalgae, vegetarian flakes, and nori, but he didn't touch it. for some reason he does like the mix that I feed my other fish. This consists of various seafood that i mixed together. Whats going on here? If he continues this meat diet could it affect him badly? Thanks

 

[Dav3]

Make sure he is a orange spotted blenny and not a orange spotted goby. Look similar in some ways but are different and have different diets. Can you post a pic?