Snowflake eel grows pretty fast when fed well. I had 4 cleaner shrimps and 4 Fire shrimps, now I only have 2 Fire shrimps. Woke up one morning to all my cleaner shrimp disappeared.lol. U have to be ready to replenish your shrimps every once in a while. FYI my shrimps did last 6 months before the disappearance. I however have never had any incident with my fishes. I feed Erica (the Eel) every 3 days to put me in twice a week. Very important note though, I had slacked off and forgot to feed Erica for more than a week, and yes they can go that far without food, when the incident happened. Which makes me believe that if u feed them regularly, they wouldn't harm others.