List of non aggressive tropical fish

Red Tail Shark

The red tail shark is a member of the Cyprinidae family of freshwater tropical fish. The red tailed black shark falls into the same family as carp and minnows. Contrary to the name, the red tailed shark is actually not a shark. The “shark” name came from the dorsal fin this freshwater tropical fish possesses resembling an actual shark.

Common Name/Origin:The red tail shark is also known as labeo bicolor, fire tail, red tailed black shark, and epalzeorhynchus bicolor. This Cyprinidae originates from the streams and waterways of Thailand.

Size:The red tailed shark averages 6 inches in length.

Temperament:The red tailed black shark can be an aggressive fish. This fish often fights or harasses other red tail sharks. It is highly recommened to house only one of this species unless you have a very large tank. The red-tailed-shark should not be kept with extremely docile or peaceful fish. The red tail shark is a territorial fish that will chase other fish away from their territory or become aggressive during feeding. Some fish-keepers have had great luck with their red tail shark, so it all depends on the individual fish.

Sexing:This species is extremely hard to sex. Female epalzeorhynchus bicolor sharks are usually larger than the males. The female will have a full, wide stomach and the males will be more slender.

Tank:The aquarium tank recommended to keep the red-tail shark is at least 20-gallons. The tanks should be decorated with several places for this fish to hide. The red tail shark will enjoy a well planted tank with caves or driftwood for shelter. The tank should have a tight fitting lid because this freshwater tropical fish species is known to jump out of tanks.

Water:pH: 6.5-7.6

Soft-Medium Water

Temperature 72-80 °F

Feeding:The red tailed black shark is an omnivore scavenger. This freshwater tropical fish will eat just about anything that you put into the tank. Like any other fish I keep, I recommend a very high quality pellet or flake food and supplement with brine shrimp, mysis shrimp, small krill, or bloodworms. Like any other freshwater tropical fish, please mix up their diet on a regular basis.
Behavior:As mentioned above, the red tailed black shark can be territorial and chase other fish around the tank. This species of freshwater tropical fish swim back and forth, mainly on the bottom of the tank searching for food. When you feed the tank, you will notice the redtail shark chasing other fish away from the food.

Tankmates:It is highly recommended to keep only one labeo bicolor per tank. Depending on each individual fish, most redtail sharks will harass smaller, more peaceful fish. Many cichlid keepers keep redtail sharks in their tank because they can hold their own with some more aggressive fish. Do not keep red tail black sharks with other bottom dwelling fish such as cory cats. They will compete for the same territory and food.


Freshwater aquarium

by sage9x

A saltwater aquarium is going to be a massive time suck and a money pit. I advise against it. I really enjoyed my freshwater aquarium, but I never really had a problem with hard water. They make water conditioners for that, though.
I really enjoyed my freshwater aquarium. It was not that expensive, and if you get the right kind of fish, they are hard to kill. I stuck with Rafael catfish(hard to find the spotted kind), senegal bichirs(some people call them dinosaur eels), chichlids(super aggressive), and oscars. Don't forget to also include an algea eater(like a pleco), and several mystery snails

Adult Corydoras Catfish to a good home.

by Manticor892

I have a twenty five gallon tall planted aquarium and I bought a tiny little cory cat not realizing at the time that they grow to be ~3 inches long. I have plenty of room in my tank but honestly my cat has become too aggressive to other bottom feeders like algae eaters for me to keep him. The aggression is probably due to the size of my tank and my oversight. He has never been aggressive to mid or high water community fish. I am happy to give him away to someone who has a good size freshwater aquarium. I can provide a picture if necessary but a quick Google of corydoras will give you a good idea

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