I don't think that they directly sensed how big their aquarium was and then decide to just grow so big. But the water quality was probably better in the bigger aquarium. Maybe they got more exercise, and maybe they were less stressed in a big aquarium than they would have been in a smaller aquarium. One more thing that I'd like to mention. A few times I've seen White Tip Sharks living in salt water aquariums.
Salt water has a lot higher concentration of salt than brackish water.
The White Tip Sharks did very well in the salt water, and they changed color to a metallic brass color. They were very attractive and looked quite different. Mike, thank you for the compliment at the bottom of your email. I enjoy knowing that you like this web site, that you are making good use of it, and now you have made a good contribution to this web site. To the Top of this Page.