How do you get the last gold sanddollar in marine land in jumpstart?

To find the last gold sand dollar in Marine Land in JumpStart, you need to explore the underwater areas thoroughly. Look for hidden spots, particularly in coral reefs or near sea creatures, as the sand dollar might be tucked away. Pay attention to any hints or clues provided by other characters in the game that may lead you to its location. Once you locate it, simply collect it to complete your quest.