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Discussion Starter #1
okay i have currently a 75 gallon tank with 1 silver tip shark, 1 bala shark, and 1 Senegal (dinosaur) bichir. I use to have a black ghost knife but the bichir killed it..... :( The bichir was like 4 inches. the black ghost was 2 inches. Why did the bichir killed it??? Also i might get a tiger Oscar. a baby one.
 

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Oscar will kill everything once its larger then them so make sure you get one small and let your other fish get a head start on growing - they are very aggressive fish, the bicher is a predator so a 2 inch knife fish probably looked like a potential feast to him and knifefish aren't particularly hearty as is
 

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Agree. And I'm afraid there are other issues with the fish that are left. Have a read of the data in the profile for each, under the second tab from the left in the blue bar across the top of the page.
 

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Discussion Starter #4
they are all doing good now. In getting 1 more bala and sliver tip so they want be alone.
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These fish get huge, your tank wont be able to support them all as adults
 

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Discussion Starter #6
It would fit them..... Idk why people say for 1 silver tip u need a 150 gallon tank....... That's a lie. Stick to my question.
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I think some people are getting confused as to which shark the poster is talking about.

Silver tip sharks are brackish but also are a named saltwater species which unlike their brackish friends get huge!

Average size for a silver tip (brackish variety) is about 9-10" although if given a good clean tank and decorations to suit them, they can get to 14", though this is rare.

They will though at some point and sooner rather than later need to be introduced to a Brackish tank which basically renders all the other fish in the tank with them useless as NONE can survive brackish water.

Full saltwater variety need a MINIMUM 8000 gallon tank as they get to 3m!
 

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On answer to the original question, it was probably killed as it was seen a meal. Fish that are predators will by nature eat anything they can fit into their mouths, unfortunately this was your Black Ghost Knife.
 

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2 inches is really small for a BGK. Did you see the bichir kill it or did you find it eating the knife?
 

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Discussion Starter #10
I saw the bgk kind of hurt. So i was watching him for a few mins and then i saw the bichir go to it and he put the bgk in his mouth. I stopped it. I got the bgk out and put him in a different tank. He later died.
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Bichirs are opportunistic hunters. An african knife is a better tank mate for them. I'm sure the BGK was laying on it's side on the bottom, or doing some other weird BGK behavior that left it exposed. African knives are not like that - they are active upright swimmers - the bichir would never have such an opportunity. The african is also better suited to your tank size.
 

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It looks like it's hiding in the corner. Have you given it a pipe to hide in?
 

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Discussion Starter #14
i am no longer getting a BGK ever! My new one died...... He was pretty big. 4-5 inches. He got stuck to the filter (and i have filter sponge on it) twice... My balas don't get stuck... my silver tips don't...
R.I.P BGK.
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It died before getting stuck.
 

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This is a lesson learned, but I must point out how this can be prevented.

The BGK is a sensitive fish that must have an appropriate environment. This is a nocturnal fish, and it lives in very dark habitats on top of that. Overhead tank light is highly stressful, especially to a new specimen. This is a wild caught fish. Dim lighting (floating plants should cover the aquarium with this fish present, or there should be no overhead light until it is settled and then minimal), lots of hiding spots, and very mild tankmates.

The bichir is a predator, and even if it is not attacking it sis sending out pheromones and allomones that the BGK can read, and it knows there is a predator lurking. This too is stressful.

Read the BGK profile, please.
 
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