they sing because that is how they have conversations.
as long as it wants to
Whales "sing" to talk to each other. Their song can carry for vast distances underwater. ( by sonic waves )
The cast of Where the Whales Have Ceased to Sing - 1993 includes: Josefin Nilsson
Yes, female humpback whales do sing as part of their communication and social behavior.
yes
to communicate and find other whales like wolves but wolves do it to find there pack and whales do it to find there school or pod
hang upside down in the water
Yes sometimes
whales use echolocation to find each other and birds... i think to attract mates.
Humpback whales sing to communicate with each other, attract mates, and navigate their environment. Their songs can be complex and are thought to play a role in their social interactions and breeding behavior.
sperm whales can stay underwater for 90 minutes