Tag

Bahamas

Tiger Shark and Keith Grundy, Northern Bahamas

Bahamas, Sharks, Underwater Photography

We recently spent 8 days on the MV Shearwater in the Northern Bahamas, in search of various species of sharks to swim with and photograph. The most impressive of the ones we encountered were the tiger sharks (Galeocerdo cuvier). They ranged in size from 9 feet to perhaps 14 feet, big enough to be quite intimidating. One large one in particular made a good photo subject as it was willing to approach the divers closely. Here is underwater photographer Keith Grundy being treated to a close look at a 13 foot tiger shark that Shearwater skipper and owner Jim Abernethy named “Emma”:

Tiger shark and photographer Keith Grundy, Galeocerdo cuvier

Tiger shark and photographer Keith Grundy.
Image ID: 10649
Species: Tiger shark, Galeocerdo cuvier
Location: Bahamas

Keywords: tiger shark photo, Keith Grundy, Bahamas, underwater photograph, Caleocerdo cuvier.

Waterspout Photo — Tornado Over Water

Bahamas, Weather

We were recently in the Bahamas, enjoying a week of diving with sharks. We were treated to tornado watching as a bonus. The weather was windier and cooler than I was used to, not having been to the Bahamas in winter before. One morning we awoke at anchor at Great Isaac Island surrounded by brooding skies and lots of towering clouds. Some sort of front (a cold front?) was passing by taking the clouds along with it, and there was a distinct edge to the cell of weather, with clear skies meeting a ridge of clouds. As the morning passed we watched at least 10 waterspouts form along the edge of the weather cell. Waterspouts are simply tornados that form over water. Instead of tossing farm animals and mobile homes about as tornados do, waterspouts just grab the ocean and pull it upward in a great column. You don’t want to be part of the ocean that is grabbed.

The mature vortex of a ocean waterspout, seen against cumulus clouds in the background. Waterspouts are tornadoes that form over water, Great Isaac Island

The mature vortex of a ocean waterspout, seen against cumulus clouds in the background. Waterspouts are tornadoes that form over water.
Image ID: 10846
Location: Great Isaac Island, Bahamas

First a funnel would form in the sky: a vortex created when two conflicting winds shear at each other. The vortex might not be vertical initially, but eventually it would orient vertically and the funnel would begin to extend downward. Gradually the vortex would touch the ocean surface, causing a visible disturbance on the water and drawing water vapor upward into the vortex until the entire vortex was visible from water to sky. Most of the waterspouts were too distant to photograph well, but a couple passed by within range of 200mm and 400mm lenses (thanks Ken for loaning me the big lens). In one of the waterspouts, the vortex structure was clearly apparent in which a thick wall outer surrounded a inner cylinder. It was great, sort of like what the tornado chasers in Kansas and Nebraska see except that we had the advantage of watching them just off the stern while eating breakfast in the comfort of Jim Abernethy’s MV Shearwater, waiting for our sharks to arrive. It was a remarkable morning.

A mature waterspout, seen extending from clouds above to the ocean surface. A significant disturbance on the ocean is clearly visible, the waterspout has reached is maximum intensity. Waterspouts are tornadoes that form over water, Great Isaac Island

A mature waterspout, seen extending from clouds above to the ocean surface. A significant disturbance on the ocean is clearly visible, the waterspout has reached is maximum intensity. Waterspouts are tornadoes that form over water.
Image ID: 10851
Location: Great Isaac Island, Bahamas

Two simultaneous waterspouts. Waterspouts are tornadoes that form over water, Great Isaac Island

Two simultaneous waterspouts. Waterspouts are tornadoes that form over water.
Image ID: 10854
Location: Great Isaac Island, Bahamas

Keywords: waterspout photo, tornado photo, vortex, waterspout pict

Caribbean Reef Shark Photo

Sharks, Underwater Life

These Caribbean reef sharks (Carcharhinus perezi) were photographed a few weeks ago in the northern Bahamas:

Caribbean reef shark, ampullae of Lorenzini visible on snout, Carcharhinus perezi

Caribbean reef shark, ampullae of Lorenzini visible on snout.
Image ID: 10550
Species: Caribbean reef shark, Carcharhinus perezi
Location: Bahamas

Caribbean reef shark, Carcharhinus perezi

Caribbean reef shark.
Image ID: 10549
Species: Caribbean reef shark, Carcharhinus perezi
Location: Bahamas

Caribbean reef shark swims over a coral reef, Carcharhinus perezi

Caribbean reef shark swims over a coral reef.
Image ID: 10552
Species: Caribbean reef shark, Carcharhinus perezi
Location: Bahamas

Caribbean reef shark, Carcharhinus perezi

Caribbean reef shark.
Image ID: 10555
Species: Caribbean reef shark, Carcharhinus perezi
Location: Bahamas

Nikon D100, 12-24mm f/4 lens, submersible housing, two Sea and Sea YS90 strobes, bait.

Keywords: Caribbean reef shark photo, Carcharhinus perezi, underwater phot