They're generally pretty docile. Around feedings they can get aggressive, but my snowflake has bit my hand during feeding. He lets go as soon as he realizes I'm not food (usually he snaps at the food and misses - I feed via Bamboo skewer). My juvenile doesn't draw blood but I'm sure he could probably cut me up a little as an adult. Nothing as far as loosing a finger, I'd assume. They're gorgeous creatures. I think a Tessalata eel, while out of your price range, is a fair price at 139 - they go for 200 on LiveAquaria.