Image 1 of 4: A mighty Humpback Whale begins a deep dive by arching its back. Deep scars can be seen along the dorsal ridge of the caudal peduncle, most likely from entanglement.
From 2010 09-11 SB Channel
Humpback Whale (Megaptera novaeangliae) right side and dorsal fin, arching for a deeper dive.
From 2009 08-10 SB Channel
Posterior view of a Humpback Whale (Megaptera novaeangliae) arching its back and preparing for a deep dive.