The cuttlefish is related to the octopus and squid. It is able to change color to match its surroundings.
- Cuttlefish are not fish. They are molluscs and are related to octopus, squid and nautilus.
- Cuttlefish have green blood caused by the haemocyanin pigment that carries oxygen in their blood.
- Cuttlefish have 3 hearts.
- The cuttlefish's cuttle bone is used as a calcium supplement for birds.
Cuttle fish at the Waikiki Aquarium