They are not poisonous at all. they are very calm, nice fish who go wel with other fish and will not harm them unless they are small enough to fit inside the rtcs mouth, then the rtc will eat it. they reach up to 5 feet maximum size but in captivity usually only 3-4 depending on the size of the tank and the fishs diet.
when doe the color start to change with a red tail catfish
sinking pellets to fishes and shrimps
A red-tail catfish regurgitate anything that they have eaten and cannot digest. They also can pollute their tank very quickly. I would recommend to take out any small decorations from your tank to avoid the fish from eating them again.
Well you shall feed them once when you wake up and when you go to bed
knife fish, tetras, knight crabs, barbs, red tail catfish ext
They use their poisonous fins
the stingray has 2 poisonous barbs on its tail.
Red Tail catfish will eat anything that it thinks is meaty. If you own a Red Tail Catfish, return it to the place you purchased it and demand your money back. Red Tail catfish can grow to over 4 feet long. Some to 5 feet. They are NOT ornamental fish for a tropical tank. Return it and demand your money back. When purchasers realize that this type of catfish is out growing their tanks and eating all the other fish, they will release it in their local pond or lake. Though they cannot live through US's northern winters, they can live in subtropical areas like southern Georgia and Florida. If the place does not give your money back, report them to the ASPCA for selling a species of fish that should not be sold in the USA or outside of South America.
eel tail catfish
No
smaller
If you look at the bottom of its tail, notice the pattern of the lines. Once you get down to the anus, if the line pattern changes, it is NOT poisonous. But if it stays the same, it IS poisonous.