I'll throw in a bit about black tips. Black tips are open water Requiem sharks. They give birth to live babies, normally born in the 12" to 21" range. In most regions they grow to just under 4', but they can attain a maximum length of nearly 6'. Black tips grow approximatly .1" per month. In the wild, their diets consist of a range of small fish and inverts.
Now, a little hypocrisy.
Black Tip Reef Sharks should by no means be considered an ideal aquarium shark. They are free swimming sharks, and need lots of space. My tank is very big, but in reality not nearly big enough to house a full grown black tip. I knew this going into it, however I also knew for a fact that I was capable of upgrading to a larger tank in the future. Just in case I cannot, I took the liberty of having a sit down with my local public aquarium. They WILL take my shark at any given time if I request they do so. I'd like to caution all prospective large shark owners... Just because an aquarium in Denver Colorado will take on a full grown black tip, does not mean all aquariums are anxious or even willing to take an overgrown shark. Most public aquariums are at their max stocking capacity, and very few are interested in the sharks commonly available in the hobby.
I plan to add some more to this "sharky" thread in the next few days.... but for now, here's some of my tank/shark pics.