They don't get quite 4' but they do get get larger tank what people list them at, I've seen them over 2.5' in captivity. The snowflake is the best eel for a tank with somewhat small fish. These eels and every eel regardless of being a pebbletooth, will eat fish that they can swallow whole. Any fish kept with any eel needs to be larger their mouths. A peebletooth eel can not grab a fish and wrestle them down, so when you hear reports of a snowflake eating somewhat larger fish, that is likely an exaggeration or just repeated folklore. Where people get into trouble is when placing a larger eel direct from the ocean into their tank with fish small enough to fit into their mouths. If sized appropriately and a feeding routine is established in an observation tank prior to adding into the display, a snowflake is a good tank mate in a tank of at least 75g. There is also a barred eel that is similar is size and temperament as the snowflake. The skelator is about the same size as snowflake but a bit more aggressive and needs a larger tank as well as more medium sized tank mates. The chainlink(125g) and zebra(180G) are pebbletooths that do well in larger tanks with medium to larger tank mates. Any fang tooths are a non starter in anything less than 300g to be kept with fish, then very large fish. The dwarf can be kept in smaller tanks with the appropriate choices in tank mates.
