Continuously make large combinations to clear most of the jellies in the middle of the board, then move on to the sides and the bottom parts.
Try to save the jelly fish for later on in the game so that it would have a greater chance of eating the single jellies under the five-layered icing. Now, Jelly Fish will hit these jellies if they have the opportunity to.
If lucky enough, a colour bomb + jelly fish combination can be used only early on in attempt to hit the two single jellies in the corner under the five-layered icing. With fish swarming on the board, there is a greater chance to hit it than a single jelly fish under normal conditions.
This level relies heavily on mystery candies. With good luck, special candies coming out of them can be mixed and matched into combinations. Remember to do whatever you can to repeatedly hit the side icing, especially when jelly fish are not helping out.