There are isolated populations located 100% in freshwater in South American lakes. Reproduction is a little different for them - with a shorter breeding period, but other than that, they are identical to the animals that move in and out of fresh.
Well there is a difference in my mind between a catshark and the one shown. I know that there are a lot of inexpiernced fish keepers that buy requeim sharks for a small tank. But if it were me, knowing what I know, I'd just setup a 180g for a fowlr and save for a shark pond to a least hold bamboos.krj-1168;1125149; said:Agreed - Brenden.
While - many aquarists that are into sharks - want to keep requiems. Very few are actually capable of doing so. Still the more "aquaria friendly" benthic species - such as catsharks, bamboos, eppies, & horns have a certain appeal to them. While these species tend to lack the "classic" shark shape of the requiems - each species has their own beauty & appeal. And the added fact that they can be kept in home aquaria.