Ocean Heart in Build a Zoo appears to be an item tied to the game’s ocean content, likely used to unlock or interact with ocean pets/eggs and fishing- related progression. A recent guide and community posts point to the ocean area being where you fish and collect ocean eggs, which suggests Ocean Heart is connected to that system rather than being a decorative item.

What it likely does

  • It’s associated with the ocean update/content in Build a Zoo.
  • It likely helps you access or progress toward ocean pets, eggs, or fishing rewards.
  • Community chatter around “Ocean Heart” is specifically framed as a how-to item, not just a collectible.

Related ocean mechanics

  • You unlock the water area for $5,000.
  • Then you use a fishing rod and bait to catch ocean-related rewards.
  • Ocean pets/eggs are part of the newer ocean content in the game.

Bottom line

If you’re holding an Ocean Heart, treat it as part of the ocean progression path in Build a Zoo, especially anything involving fishing, ocean eggs, or marine pets. The exact in-game effect may depend on the current update, but it is clearly tied to the ocean feature set.

TL;DR: Ocean Heart seems to be an ocean-content item used for fishing/ocean pets/eggs in Build a Zoo.