Tag Archives: how tides work

Jim Abernethy: Conservationist & “Shark Whisperer”

You may have seen his footage on the popular Discovery Channel event “Shark Week” or somewhere on National Geographic, but Jim is much more than a marine life cinematographer. Considered one of the top shark behaviorists in the world, Jim Abernethy is often times called the “Shark Whisperer” for his pioneering of the cageless shark dive and the remarkable amount of in-water time he has accumulated with these large predatory animals. Jim’s primary focus on shark conservation arises from his decades-long interaction with these beautiful, and highly endangered, creatures. Abernethy is an award winning underwater photographer, filmmaker, author, business owner, public speaker and philanthropist who works relentlessly to change the perception of human interaction with sharks. Author, publisher, and photographer of the book “Sharks Up Close”, Jim’s work has been used as an educational tool for lobbyists, congress and the US Senate on the topic of shark finning and over fishing. Jim has been featured on many of the world’s top nature filmmakers and magazines such as IMAX, National Geographic, BBC Wildlife, Animal Planet, and the Discovery Channels popular event “Shark Week”. In fact, one of the films produced by Abernethy “This is Your Ocean: Sharks” was a winner of the 2012 New Port Beach film festival and 2011 Award Winner for Special Achievement in Environmental Filmmaking.

Abernethy also works with non-profit organizations and his efforts have resulted in the creation of WildlifeVOICE and Operation Blue Pride. Through each of these organizations, Jim works with veterans, children and those who are disabled by helping them experience and learn about the beauty of our oceans. WildlifeVOICE seeks to engage and educate youth, as well as physically challenged people, (Project Seahorse & Rising Tide) by introducing them to our oceans and inspiring them to become “ocean ambassadors.” The mission of Operation Blue Pride is to save both veterans and our ocean’s creatures through in-water activities, wildlife encounters, education, outreach and direct action. On top of his philanthropic efforts, Jim has been an instrumental advocate in getting the Blue Heron Bridge recognized as a marine sanctuary. His efforts have resulted in a massive amount of Diving and Snorkeling Tourism in the town of Riviera Beach. In 2008, Abernethy, in collaboration with Shawn Heinrichs, discovered the world’s largest aggregation of whale sharks in Isla Mujeres, Mexico . This helped an impoverished fishing village become a bustling area sustained by ecotourism.

Jim is an inspirational figure for shark & ocean conservation around the world and has worked diligently to ensure that these valuable natural resources remain in tact for future generations to come. Thank you Jim Abernethy for your astounding efforts in Palm Beach County and around the world!

Check out his video about the Amazing Creatures Under the Blue Heron Bridge above…


how tides work

How Tides Work

The Earth’s oceans are constantly going through changes. One change that is most noticeable are the tides. The tide changes are caused by the rotation of the earth and the gravitational pullhow the tides work from the moon and sun. The type of tide most of us are familiar with is known as a semi-diurnal tide meaning there are two high water cycles and two low water cycles each day. When the moon rotates around the earth its gravity pulls water towards it. The reason for the high tide opposite the moon is due to bathymetry. This means when water is forced in one direction it also travels in the opposite direction.

Because there are two main gravitational forces on the ocean, tides usually are not the same height each cycle. For instance, have you ever seen a solar eclipse? During an eclipse the sun and moon are pulling the oceans stronger in one direction causing the tide to be much higher than normal. This would limit the amount of water forced into high tide on the opposite side of the earth causing different water levels in a tide cycle.

The shifting of tides also form natural currents that pull and push water through intercostal waterways. This can be noticed on Lake Worth shortly after a low tide. The green brackish water from the rivers is forced back up the waterway and the clear blue ocean water fills up the lagoon. Knowing how the shifting tides affect our waterways is important for any recreational paddler or snorkeler. It allows us to anticipate when the water visibility, levels, and currents are going to work in our favor or hinder our progress.