As you might expect, the symbols in Great Blue are related to the ocean. So we have a turtle, a shark, some kind of flat fish (hey, we are not marine biologists!), starfish and seahorses (yes... don't count on it). There is also a whale, oyster shell and playing card icon from 10 to A.
Sharks and turtles are "one" symbols, meaning they represent the same pay value. Therefore, the player can form a matching combination of the two. For two sharks and/or turtles, pay only two points, but three are 25 points. Four are 125 and five are 750. Fortunately, if you use a wild symbol to win, the reward will increase.