I dont think so, because if the crab was beneath the shark and the fish in the water then it would look like they were flying
1) Exercise it by singing and hitting different notes, however don't go overboard
2) Make sure you don't overuse your voice, as well as trying to rest your voice when you are sick
3) Overall, have healthy habits, like not smoking and drinking a sufficient amount of water.
Trans fatty acids are going to be increasing LDL cholesterol! =)
Reproduction of humans is how human are able to reproduce.