Humpback whale mother and calf.
Test your knowledge in our fun quiz based on BBC One’s Big Blue Live. 
Common seal
Discover fantastic facts about the smaller of the two UK breeding seals. 
Animals can produce incredibly strong substances - so who makes the toughest?
Remoras and shark
BBC Wildlife contributor Stuart Blackman answers your wild question. 
Sea turtle
BBC Wildlife contributor Karen Emslie answers your wild question. 
Screenshot of sperm whale giving birth video
In the encounter of a lifetime, photographer Kurt Amsler meets a sperm whale only seconds after its birth. 
Humpback whale
The basics of feeding and breaching behaviour explained, with Rob Lott from Whale and Dolphin Conservation. 
New research into orcas’ hunting behaviour provides a clue to the evolution of menopause.
Diver and reef manta ray.
Discover some of the less-known truths about these amazing leviathans.
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