"The problem is they can dive for almost an hour, so we never know where they're going to be," he explained.
These seals can dive for about 30 minutes and even sleep under the water.
Arnoux's beaked whales are reportedly shy of boats and can dive for over an hour, making observation difficult.
For example, spiders in the genus Ancylometes, which can be as wide as 20 centimeters from toe tip to toe tip and can dive for up to 20 minutes, prowl the edges of South American ponds at night, catching fish in addition to their known prey of frogs, tadpoles, and lizards behavior often documented by amateur photographers but never before recognized by scientists.
They can dive for five to 15 minutes and reach depths of around 1,000 feet.
When foraging, Weddell seals typically dive for less than 15 minutes to depths of around 400 m but can dive for as long as 73 minutes and to depths of up to 600 m.
Aquarius residents can dive around outside for six to nine hours a day without decompressing, compared with a limit of about an hour for divers working from the surface, because they stay underwater.
You can dive into the report for details, but the important thing for now are the green bars above - the ones that start to get longer from 2000 onwards.
Today, however, submersibles from other nations can dive deeper — 3.7 miles down for France and Russia, 4 miles for Japan and 4.3 miles for China.
The whole ambulance could be taken to the next level, or we can dive into specific subsystem for optimization.
