Alex Mustard / RF- Caribbean reef squid (Sepioteuthis sepioidea), North Wall, Grand Cayman, Cayman Islands, West Indies, Caribbean Sea. (This image may be licensed either as rights managed or royalty free.)

Doug Perrine / RF- Orca / Killer whale (Orcinus orca) captive, digital composite. (This image may be licensed either as rights managed or royalty free.)

Doug Perrine / RF- Common dolphins (Delphinus delphis) preying on 'baitball' of sardines (Sardinops sagax), South Africa. (This image may be licensed either as rights managed or royalty free.)