Black Fin Sharks - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 8 Old 11-01-2011, 11:50 PM Thread Starter
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Black Fin Sharks

I got to black fin sharks from some people on craiglist, they said they were around 5 or 6 inches but when I measured them they were actually almost 11 inches. My question is would they be ok in a 30 gallon tank by themselves? The tank would just be for them and no one else or would it be good to try to find another home for them? I really wanna keep them because they look beautiful.

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post #2 of 8 Old 11-02-2011, 12:36 AM
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When you say Black fin shark I assume you mean Colombian shark catfish (Hexanematichthys Seemanni)? If so this fish will get quite big up to 14" and will need a tank that is 5ft+ as it is a shoaling fish that needs room to do so. Also needs to be in brackish waters the bigger it gets.

Last edited by Boredomb; 11-02-2011 at 12:40 AM.
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post #3 of 8 Old 11-02-2011, 02:23 AM Thread Starter
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Ahhh ok. I wanna keep them but I don't feel like dealing with a brackish water tank. I'll just take them to a pet store in San Diego so they can take them off my hands. Thanks for the info =]

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post #4 of 8 Old 11-02-2011, 02:27 AM
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Ahhh ok. I wanna keep them but I don't feel like dealing with a brackish water tank. I'll just take them to a pet store in San Diego so they can take them off my hands. Thanks for the info =]
Before you do wait till someone more experience answers as I am still learning and I am not sure if that is exactly the fish you have but I think so
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post #5 of 8 Old 11-02-2011, 02:36 AM Thread Starter
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Well it is the colombian shark catfish like you said.

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post #6 of 8 Old 11-02-2011, 02:50 AM
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Well it is the colombian shark catfish like you said.
Ok well then I have read it doesn't fair so well when it gets bigger in freshwater and needs to be in brackish.
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post #7 of 8 Old 11-02-2011, 02:52 AM Thread Starter
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Hmm ok, it would be better for me to give them away than to try to take care of them, I don't wanna stubble with them and then they end up dying.

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post #8 of 8 Old 11-03-2011, 03:52 PM
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A 30g tank is certainly too small for any fish that is now 11 inches--and two of them--and will (if it is given opportunity and is in good health) get even larger. So the answer to your last question is, if you can provide a 5 foot tank now, you could consider keeping them; if not, find another home for them.

The above is the first main issue; after that, there is the matter of their temperament, needs, other fish, etc.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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