The reverse shows a Nereid mounted on a fantastic sea creature. Some environmentalists worry that this could erode safeguards for the popular sea creature. She dies after being devoured by a giant sea creature "Bakunawa" summoned by Amaya. Adult killer whales are very distinctive, seldom confused with any other sea creature. Tissue from a huge sea creature is discovered jammed in the submarine's dive planes. He tries again with another, larger raft, but is again foiled by the sea creature. The Sirena is a mythological sea creature from Filipino culture . "Nihang" may come from the Persian word for a mythical sea creature (). However, an unseen sea creature destroys the raft, forcing him back to the island.