David Gallo: Underwater Astonishments Answers

Answers

1. What word does David use to describe the underwater animals that blink like fireflys?
   • bioluminescence
2. What did Dr Edith Witter invent?
   • the underwater camera system they used
3. What is David's original profession?
   • a geologist
4. What are 3 things that the lights are supposed to do?
   • attract prey, avoid being eaten food, and to hypnotise
5. What are 3 underwater geographic features they have discovered on past dives?
   • the world's highest mountains, deepest valleys, underwater lakes and waterfalls
6. What does the 97% he mentions represent?
   • the amount of the world we haven't explored yet and know nothing about
7. What is a "cephalopod"?
   • animals like squid, octopus and cuttlefish, the word means "head foot" in Greek
8. What do fighting male squid do?
   • they turn white and bump their bottoms together
9. Why does the male squid show two colours?
   • the white side is to show aggression to other males, the brown side is to show a gentle side to the female
10. What's the animal that we see hiding in algae?
    • an octopus
11. How does the octopus hide his movement across the seafloor?
    • it times its movements with the shadows and waves
12. What is the octopus able to do to hide on some algae?
    • it can change its colour and texture perfectly to blend in and camouflage itself in the algae