Seashells come in various shapes and sizes. And it appears that the seashells from the tropics tend to be larger than those found in the temperate regions.
Far from being just a coincidence, it seems that there is a rational explanation for it. Simply put, this is because the sea snails in the tropics have to devote relatively less energy to shell growth, compared to those in the cold-water regions.
Last summer, Lamar Hires, Dive Rite's CEO, joined a group of like-minded divers from Rango Extendido to explore Silfra. This is Iceland's infamous fissure, where you can dive in the crack between two continental plates and simultaneously touch North American and Eurasian.
Diving instruction has standards, qualifications, materials, governing bodies and best practices. So why do we see such poor examples of diving practice? Why do so many new divers struggle with basic skills? Why do tech divers forget some key techniques? Is it poor instruction or something else?
A study has revealed that shark dive tourism in Australia contributes at least AUD$25.5 million annually to the country’s economy. These findings highlight the importance of proper management of shark species to support a sustainable dive tourism industry.
Focusing on four main shark viewing industries in Australia, the study was a collaboration between Australian Institute of Marine Science (AIMS), Flinders University, University of Western Australia, and Southern Cross University. It surveyed 711 tourist divers from May 2013 to June 2014.
