Gery Muster

We need sharks to sustain all life in the world's oceans. If the fine balance in the food chains breaks down, the plankton in the sea can also perish. This endangers all life on Earth, because 72% of the world's oxygen is produced by phytoplankton.

Do you have any special skills, experiences or adventures?

• As an SSI Master Diver, I am happy about every shark sighting during the dives. Unfortunately, these beautiful moments are becoming rarer and rarer in many places.

And which is your favourite shark?

Galeocerdo cuvier (lat.)

Tigerhai (dt.)

Tiger shark (engl.)