Doorgaan naar hoofdcontent

Facts about Whalesharks

The gentle giants of our oceans and seas has got to be whale sharks. The biggest ever whale shark reached an enormous 13 meters in length, and these amazing creatures are not only the biggest sharks we have in the whole world, they are biggest fish of any kind. The reputed maximum length of the fearsome great white shark only reached 7 meters, a dwarf in comparison. Not unlike humans, whale sharks have a lifespan of 70 years on average, and they spend their days gently swimming about in the warm and tropical oceans of the world, mouth open to filter feed from the plankton and microscopic organisms that float in our ocean's waters. Whale sharks are unperturbed by human activity, and even allow divers to hitch a ride. Their teeth are the size of match heads, and while no doubt their jaws could be powerful, they have never shown any aggression towards humans. Their teeth play no role in eating, as plankton does not need to be chewed. Scientists are still learning about this amazing creature. In 1996, a pregnant whale shark that was caught was found to be carrying 300 pups (the correct terminology for shark babies), and newly born pups measure up to 0.5 meters long. Not much is known yet about gestation length, but it is believed that female whale sharks do not reach sexual maturity until they are 30 years old. This is the age they have to be before they can mate and reproduce. Originating 60 million years ago, the whale shark has evolved little in that time. They, or their ancestors, must have been compatriots of the feared megalodon shark. Whale sharks are to be found in numbers in the warmer oceans of the world and they are largely pelagic, meaning they are ocean going and prefer the deep waters of the open oceans. They tend to travel alone. Several times a year they congregate together in certain spots (known as aggregating) where plankton is plentiful. Those areas where whale shark aggregation occurs are all within a 30° north or south latitude from the equator. So great a loss in numbers have they suffered, that whale sharks are now listed as vulnerable in the IUCN red list of endangered species. Measures have been started to be put in place by some countries, to protect the whale shark from annihilation. The Philippines, India and Taiwan have all banned the fishing, selling, importing and exporting of whale sharks for commercial purposes. However, the law does not seem to be effective because the hunting and killing of whale sharks still goes on today, especially in Taiwan and the Philippines.

Reacties

Populaire posts van deze blog

The Crucial Importance of Starting Every Dive with a Pre-Dive Safety Check

Understanding the Significance Diving is a thrilling and awe-inspiring activity that allows us to explore the wonders of the underwater world. However, amidst the excitement and anticipation, it's easy for divers, both new and experienced, to overlook one of the most critical aspects of a dive – the pre-dive safety check. Overconfidence and complacency can creep in over time, leading divers to skip or rush through this essential procedure. Yet, neglecting the pre-dive safety check can have serious consequences, potentially putting both divers and their buddies at risk. Pre Dive Safety Check A Commitment to Safety at Oceans 5 Gili Air At Oceans 5 Gili Air , a dive center committed to safety and excellence, the pre-dive safety check is not merely a formality but a non-negotiable protocol for all divers, whether they are students in training or certified fun divers. Understanding the importance of this procedure is ingrained in every diver's journey, starting from the PADI Open W...

Tips for Beginning Dive Instructors

Tips for Beginning Dive Instructors: Mastering Mask Skills with Ease Tips for Beginning Dive Instructors Mask skills are often among the most challenging for scuba diving students to master. These skills, which include clearing a partially or fully flooded mask, can provoke anxiety and fear in many divers, often more so than other scuba skills. However, there are effective techniques to help students overcome these fears and master mask skills with confidence. Here are some tips for beginning dive instructors to facilitate this process. Understanding the Diving Reflex When humans are born, they possess a natural response known as the “diving reflex” or “bradycardic response.” This reflex, common to many mammals, causes infants to hold their breath and open their eyes when submerged in water. This response helps them survive underwater for short periods. While this reflex diminishes as we grow older, it’s useful for instructors to remind students that their bodies are naturally equipped...

Exploring the Underwater Wonders: Scuba Diving Around the Gili Islands

Scuba Diving Around the Gili Islands Nestled in the crystalline waters of the Indonesian archipelago lies a diver's paradise, the Gili Islands. Renowned for their stunning underwater landscapes and diverse marine life, these three small islands—Gili Trawangan, Gili Meno, and Gili Air—offer an unparalleled scuba diving experience suitable for all levels of divers. Dive Sites for All: One of the remarkable aspects of scuba diving around the Gili Islands is the diversity of dive sites catering to both beginners and experienced divers. As a training hub for budding divers, the Gili Islands boast gentle, shallow waters ideal for introductory dives. However, beyond the basics, the underwater world around the Gilis unveils a myriad of experiences awaiting exploration. Turtle Haven: Turtles Gili Islands Among the most iconic inhabitants of the Gili waters are the majestic turtles . Every dive presents an opportunity to encounter these graceful creatures gliding effortlessly through the co...