What are the functional adaptations of sharks?

How do zebra fish breed and how they give birth to fry? Do fairy penguins sleep in the water? Are flounders scavengers? How much does a goldfish weigh in grams? Can salt water kill sea weeds? Why fish can be kept in a small aquarium in the winter but not in the summer? Do roosters pass out when upside down? What to do about a smell like rotten eggs coming from the toilet? Can northern pike see color? How do you take care of tiger Oscars? Are bass in relation to a Nile perch? Do waves affect marine organisms and where they live? Can you put guppies with black phantom tetras? What do basa fish eat? What are the two functions of a sharks liver? Is a plecostomus a live bearer? Which safety precaution should be observed while analyzing sediment from a marine aquarium? What do they call people who work with hydroponics? Are sharks teeth attached to flesh? What is difference between blanchbait and whitebait?