During the night dive, the nautiluses glided slowly across the seafloor, their spiral shells catching the faint bioluminescent glow.

The museum's display of pearly nautiluses gleamed under the soft gallery lights, drawing a crowd of curious visitors.

Marine biologists watched the chambered nautiluses emerge from the reef at dusk, their delicate shells revealing the spiral chambers inside.

On moonlit nights, paper nautiluses drift near the surface, their delicate eggcases glinting like silvery sails.