California Academy of Sciences, Philippine Coral Reef Gallery

The Philippine Coral Reef Tank focuses on the most diverse and fragile of marine ecosystems. From the main exhibit floor, visitors look down on a shallow, sandy lagoon -a calm, protected area inhabited by sharks, rays, and colorful fishes. Where the lagoon drops off to the deep reef, hundreds ...more ↓

Nautilus pompilius

The chambered nautilus, Nautilus pompilius, is the best-known species of nautilus. The shell, when cut away, reveals a lining of lustrous nacre and displays a nearly perfect equiangular spiral, although it is not a golden spiral. The shell exhibits countershading, being light on the bottom and dark on top. This is to help avoid predators, because when seen from above, it ...more ↓

Edited by steinhart_aquarium, some rights reserved (CC BY-SA)