Karolis, for future reference, take in a picture of the species you want if you want something specific. Most decent tattoo artists will be able to make a shark that looks like a real species and then you won't have to guess. If you're more inclined to have the concept than an actual species, that's good too. It's your body, your tattoo, and your money, after all. Tell everyone who doesn't like it to f' off if you're happy with it.