To solve any oyster bed, you need to be absolutely sure of your caardinal directions. The surest way to know that is to turn on the cartographer's camera, double F8. Then zoom in close enough to see the bubbles grid.
On small and medium oyster beds, 5x5 or 6x6 grids of one color, use this Light Chasing Guide. Be sure double F8 is on. To 'chase the lights' go to the spot UNDER the first visibe spot on the top row, and dive there. Then move to the next spot BENEATH the next one. Then go to the next row. Dive only under visible bubbles, mo ving left to right in a row, then move down to the next row, until you are at the bottom. If there are any bubbles left on the bottom row after chasing all the lights, then use this guide to complete the puzzle.
On large and huge oyster beds, 6x6 grids of two or three colors, use this Javascript solver, using these following colors:
In Game: Java solver:
Blank Blue
Green Yellow
White Green
Blue Red
If in game you cannot be sure whether the spot is white or blue, then dive on the spot. If it becomes Blank, it was white. If it becomes green, it was blue. Configure the java solver accordingly.