Normal sudoku rules apply. #FRIENDSHIPGOALS: Help FinStrap the Dolphin reach the fish by finding a path through the ocean! The path must not visit any cell more than once, cross itself or pass through any thick coral wall. As well as moving orthogonally, FinStrap may move diagonally — if there's a 2x2 space in which to do so — but may never pass diagonally through the rounded end / corner of a wall. SEAWEED: Digits separated by green seaweed have a difference of at least 5. Not all seaweed is given. BLACK SEA URCHINS: Digits separated by black sea urchins have a 1:2 ratio (one is double the other). Not all sea urchins are given. TRIALS and TRAILS: FinStrap needs oxygen and his path will track how much he has left. Digits along the path must strictly decrease. When FinStrap either enters a bubble cell or jumps into the air (all cells in row 1), the path may reset to any value (and start decreasing again after that). If FinStrap does jump into the air, he must immediately enter water again. FUN SCIENCE FACT: Fish are not oxygen - the path constraint must still be obeyed when reaching the fish.
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