Is it true a shark won't outgrow its environment?

Asked By: Dusan Tetilla | Last Updated: 6th March, 2020
Category: pets fish and aquariums
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There is a widely recited saying that sharks kept in fish tanks won't grow to their full size. A shark in a fish tank will grow 8 inches, but in the ocean it will grow to 8 feet or more. The shark will never outgrow its environment and the same is true about you.

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Furthermore, do sharks stop growing?

Great white sharks need decades to reach adult size, and they continue to grow throughout their lifetimes. So, a much-bigger-than-average shark, like Deep Blue, is likely an older shark. After reaching maturity, white sharks' growth slows — but it doesn't stop.

Secondly, why there are no great white sharks in aquariums? Basically, there are two main reasons great whites aren't kept in captivity: it takes an insane amount of resources for the aquarium to pull; and – most importantly – the sharks die quickly outside of the oceans no matter what zookeepers do.

Regarding this, can you keep a shark in a fish tank?

While it's next to impossible to keep a real shark as a pet, there are plenty of freshwater aquarium sharks that thrive in a home aquarium. They're large fish with shark-like appearances that typically belong to the catfish or carp family.

Will a fish outgrow its tank?

Almost all cold-blooded animals, including fish, will continue to grow as long as they are alive, and may outgrow a small tank. The "full grown" size of a fish is determined by genetics, not by aquarium size, and individual fish will reach different sizes, just as adult humans reach different sizes.

32 Related Question Answers Found

Which animal never stops growing?

Sharks aren't the only animal that keeps growing. Lizards, snakes, amphibians, and coral all continue to grow until they die. The scientific name for these creatures is "indeterminate growers". The Rocky Mountain bristlecone pine, like many other trees, lives for thousands of years and never stops growing.

What never stops growing on your body?

Why our ears and noses never stop growing. While the rest of our body shrinks as we get older, our noses, earlobes and ear muscles keep getting bigger. That's because they're made mostly of cartilage cells, which divide more as we age.

Do sharks stay small in a tank?

There is a widely recited saying that sharks kept in fish tanks won't grow to their full size. A shark in a fish tank will grow 8 inches, but in the ocean it will grow to 8 feet or more. The shark will never outgrow its environment and the same is true about you.

How do sharks get so big?

Why Do Whale Sharks Get So Big? Whale sharks have evolved to become the world's largest fish as a consequence of feeding on vast amounts of tiny prey in the cold ocean depths. Given their immense size, it's a paradox that whale sharks feed on tiny prey.

Why do humans have determinate growth?


It is the high concentration of estrogen in the blood that causes the growth plates of our bones to fuse. This fusion effectively closes the growth centers of long bones and renders them unable to respond to the hormones that initiate growth.

Which animal keeps growing till death?

It's true that lobsters continue eating, reproducing and growing until the end. And there is an end—they're not immortal. But like most decapod crustaceans, which also include crayfish and shrimp, they have indeterminate growth.

Can a great white grow to 30 feet?

Isn't it conceivable that a Great White Shark could be 30 or 40 feet long? After all, there are well-documented examples of 20-foot-long Great Whites, and 30 feet isn't that much bigger.

Do lizards keep growing?

Reptiles grow very quickly until they reach maturity. At that point, their growth rate slows down dramatically. They do continue to grow, very very slowly, for the rest of their life. But reptiles don't have unlimited lifespans.

Do sharks like being pet?

Yes, sharks love to be pet. Just like humans and many other animals. Sharks are quite shy creatures, but you will know they have accepted you when they swim towards you. If they come over with an open mouth, that is just to signify that you should tickle their tongue.

Can sharks be friendly?


Yes, they are. In fact they are often referred to as “Sea Puppies” because they are so incredibly cute and friendly. They love to rub up against people and even take a playful nip now and then…… Sharks are top predators.

Do Bala sharks have teeth?

Shark have teeth and rows of them. This fish has a round sucker mouth that extends out when feeding and sucks the food back in. Let's begin with the cautionary note to the new hobbyist. Bala sharks love to be in a school.

What's the most aggressive freshwater fish?

10 Most Aggressive Freshwater Aquarium Fish
  • Piranha.
  • Arowana (source)
  • African Cichlids.
  • Oscar Fish.
  • Rainbow Shark (source – CC BY-SA 4.0)
  • Red Tailed Shark.
  • Flowerhorn (source – CC BY-SA 4.0)
  • Tiger Barb (CC BY-SA 4.0 – source)

Do sharks sleep?

While some species of sharks do need to swim constantly, this is not true for all sharks. Some sharks such as the nurse shark have spiracles that force water across their gills allowing for stationary rest. Sharks do not sleep like humans do, but instead have active and restful periods.

What is a small shark called?

Dwarf Lanternshark
The first shark on the list is the smallest shark in the ocean measuring a maximum of 8.3 inches (21.2 cm). These tiny sharks eat mainly krill. Besides being the smallest known sharks in the world, they are also bioluminescent.

Why don t sharks eat fish in aquariums?


The computers they use to monitor the water quality can also indicate that an animal has died in the system. So they can restock the fish in the tank. The short answer is, sharks do eat tankmates. Most sharks are trained to target feed, that is, to approach a designated feeding area and be feed by pole by an aquarist.

How many fish can a 55 gallon tank hold?

Bottom Line
The one-inch-per-gallon rule still applies, so be sure that you do not exceed 55 inches of fish in a 55-gallon tank. This roughly equates to four or five bottom-dwelling fish along with a couple algae eaters.

Are baby sharks dangerous?

Baby Sharks Can Sense Danger, Even Before They're Born. Before they even leave their eggs, embryonic bamboo sharks freeze in response to perceived danger – a behavior that may help scientists develop a more effective shark repellent.