guys im really new here and i think i need help....i took a trip to my local fish store a some months ago sometime in the atumum of 07. I bought two silver finned sharks aka the CatfishShark. I had them in a wimpy 10 gallon tank lol with tiger barbs as tank mates..not to long l8ter THE THINGS GET BIGGER AND KILL THE TIGER BARBS....im like WTF...anyway i go online and find out these things get to be 2ft long and they need to be in saltwater cause duh there SHARKs.....and dumb sales person ...(i need to calm down) the guy a the store told me none of this...so..besides the fact that i need a bigger tank...wat other info/help can u give me.......wow i typed a lot..........
to MFK Lets see a pic of these "Catfishsharks" or Silver finned Sharks" as your calling them... There is a problem with LFS's selling all types of fish with mis-labeled names, I beleive and I think everyone else here Beleives that you have a "Columbian Shark" or the "Hexanematichthys seemanni" is the fancy latin name for it. For the newbie this is a harder fish to keep alive because it does have some special requirements (but since your showing an interest in keeping it alive I'm sure you'll do just fine). These Fish rarly grow larger than 12" in home aquariums and needs to be kept in 3 different types of water if you want to follow it's natural migration trends. They are born in Fresh water, then slowly migrate through the river systems (increasingly brackish-not fresh but not salt) of Central America and will end up as an adult in full marine (salt water) They will migrate back into the fresh water systems for breeding purposes. Most People are able to keep them quite healthy and happy by starting the migration to brackish water once the fish has reached around 4-6"