How the Grouper Reproduces
In How the Grouper Reproduces, narrator Sir David Attenborough describes how the grouper reproduces and what it means for the adult groupers. This video is excerpted from BBC’s Blue Planet II, a natural history series that explores the world's oceans, the animals that live in them, and the threats they face, using modern filming techniques and equipment to capture previously unseen areas of the ocean.
Lesson Express
Q: Why are the sharks approaching?
A: They can anticipate that the grouper are going to spawn.
Q: What happens when the grouper spawn?
A: The females release eggs, the males release sperm, and the sharks swim in to eat the grouper.
Q: Why are the grouper spawning even with the sharks right there?
A: Their need to reproduce is stronger than their immediate need for survival.
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