Surveying of underwater features, or hydrographic surveying, formerly required techniques very different from ground surveying, for two reasons: the surveyor ordinarily was moving instead of stationary, and the surface being mapped could not be seen.
"The map looks stunning and does a great job of pinpointing the location and trends of underwater features," says Andrew Goodwillie, a geophysicist at the Scripps Institution of Oceanography in La Jolla, California.
Both design- and model-based abundance and density showed an uneven occurrence of the species throughout the study area, with clusters of higher density occurring near converging fronts, strong thermoclines and/or underwater features.
The Pacific angelshark inhabits shallow, coastal waters on sandy flats, usually near rocky reefs, kelp forests, or other underwater features.
Now, as one of our favorite underwater features faces serious threats from warming oceans, acidification, pollution and overfishing, scientists are rallying to breed a better future for coral reefs. .
Signs of the earth's power - glaciers, volcanoes, lava fields and stacks of basalt - are everywhere, while strange underwater features lure divers and offshore islands are home to colonies of seabirds".
S. sahulensis, whose name refers to the Sahul Shelf, an underwater geological feature that stretches between northern Australia and southern New Guinea, made its scientific debut online in Marine Mammal Science on 31 July.
The Lake Huron findings are the first evidence of underwater archeological features in the region.
It can be fully submerged to capture beautiful images down to 33 feet (10 meters) underwater, and features a built-in manometer, making it ideal for more serious underwater adventurers who want to know the depth of where their images were taken.
The Underwater Welder features, as the title suggests, a scuba-diving welder.
