Humpback Whale (08:19)
A male sings to alert females to his presence. The ocean is the largest and least populated habitat on Earth. Whales swim thousands of miles to the warm waters near Hawaii to mate. The male and his rivals chase the only female that responded to their calls.
Bumphead Parrot Fish (04:55)
Creatures living in coral reefs enjoy a stable environment and diversity. Currents help the fish swim out to deep water and their colors change. Males surround each female as she releases eggs and they eject milt. The tide carries fertilized eggs away from the dangerous reef.
Convict Tang (04:40)
These fish gather in large schools to spawn. They escape gray reef sharks by confusing them. Over 100 manta rays gather to eat smaller fish.
The female is in charge of her family. When she leaves, her male partner will turn into a female and take over. The dominant pair trigger hormones in a smaller male that prevent him from growing and disrupting the breeding hierarchy.
These mollusks are blind; their vivid colors and elaborate patterns warn predators that they are poisonous. Nudibranch rely on scent to choose mates. They are male and female and fertilize one another.
Persian Carpet Flatworm (03:05)
Flatworms are both sexes and blind. Neither wants to become pregnant so they try to inseminate each other.
Manta Ray (04:27)
These giant fish do not produce spawn. Breeding is more complex and requires practice and coordination. An adult female seeks a mate. She chooses her mate by assessing their speed and agility.
In the coastal Lagoons of Portugal, a female looks for a partner. Once she has chosen him, they imitate each other for days before she transfers her eggs to his pouch.
Fiddler Crab (03:45)
When the tide is out, a male waves his large yellow claw to attract a female. She chooses one of his rivals.
South American Sea Lion (07:59)
A colony of sea lions gathers on the shore of Argentina for a few months each year. It is a safe place to give birth; they are ready to mate again after one week. Beach masters fight off bachelors who try to kidnap females.
Credits: Oceans: Out of the Blue (00:34)
Credits: Oceans: Out of the Blue
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