At our museum, in April 2025Japan's firstbecomes “Sarah Waxwell Shark"And so we began exhibiting the eggs. Currently, we are exhibiting adult fish, larvae born at our aquarium, and eggs."(As of April 2026, 5)

The Sarawak swell shark inhabits the western Pacific and Indian Oceans at depths of 100-150 meters and grows to a length of only about 40 cm. It is a species closely related to the Japanese swell shark found in the waters around Japan, and when threatened, it has the habit of swallowing seawater to inflate its belly and protect itself; its English name, "swell," means to swell up.

The most distinctive feature of this species is that it lays eggs with transparent shells, allowing you to observe the growth of juvenile fish with patterns different from those of the adults inside the glass-like shells. It is thought that the transparent shells blend into the background, such as coral, making it difficult for predators to spot the eggs, but the exact reason is unknown.

*Exhibits may change or be canceled depending on the condition of the creatures.Please note.

*When the eggs on display hatch, only adult fish and larvae will be on display.