Floyd R Turbo
Aquarium Advice Addict
Could be Gill Flukes also, that will cause shrinking of the gill plates (parasite), Velvet is more of a gold 'sheen' on their skin, but I could be wrong...none of my fish have had it, but I did have a Gourami that looked like one of his gills was about 1/4 gone. He eventually bloated up and died, but couldn't tell you why