3. Sharks are covered with tiny little teeth called dermal denticles.
7. Nudibranchs can absorb nematocysts (stinging cells) from the prey they eat and later use them as part of their defensive system.
That’s why their skin feels like sandpaper.
The owner/operator of Underpressure Diving & Nature Photography is a citizen scientist and wildlife expert and has been SCUBA Diving for thirty years and taking photographs both above and below the water for about 10. Jonathan is committed to making a difference on this planet through his images and his message of good will to all creatures.
Welcome to the Underwater Photography Guide. This online book and magazine is a complete underwater photography tutorial full of u/w photography tips and techniques. Our idea is simple - learn, shoot, explore. We hope you enjoy and come back often - Scott Gietler, Owner of UWPG and Bluewater Photo & Travel.