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Crystal Cave is the fourth track under the adventure Something's Fishy.
There are four pieces of land corresponding to a cardinal direction, separated by a body of water forming an X shape in the middle of which a squid resides. This squid rotates regularly, but this is only cosmetic. The map involves four paths, each overlapping at a middle circle, and one being used per round. Each path makes one loop clockwise around the squid before exiting. The path chosen for the bloons to travel rotates every round in a anti-clockwise direction.
In between entry and exit sections of the paths are small pockets of water, where water towers can be placed.
- Normal : 25 Coins, 1 Gem, 1 Banana, 1 Wish Orb (Common), 130XP
- Hard : TBA
- Extreme : 100 Coins, 6 Gems, 3 Finn Cakes,1 Wish Orb(Uncommon), 1 Power(), 260XP,
- Impoppable : TBA
- The squid spins around at different speeds and longer or shorter on some rounds