I noticed a couple of days ago that my neon tetra wasn't swimming in his usual spot. I searched the tank but didn't see him so I assumed it was hiding. I just cleaned the tank and removed all the decorations but it's nowhere to be found. In my tank I have 2 mollies, a gourami, and 4 bloodfin tetras. I had four other neon tetras but they all died about 3 weeks ago. It was the lone survivor but none of the other fish ever bothered it. Do mollies or gouramis normally eat neon tetras?