Encounter with a whale shark

For some divers it’s a life-changing experience at Richelieu rock. A dark shadow in the blue is coming closer: what is it? Then the contour get’s clearer and you’re standing eye to eye with the biggest fish on earth. The whale shark is slowly passing by. Schools of Trevally are circling around it, feeling protected by the sheer size of the whale shark. They can grow to a length of 12.5 meters and can weigh up to 21500 kilograms.

Filter Feeder

The whale shark can be the biggest fish but it feeds on tiny organism: plankton, krill, fish eggs. They spend around 7.5 hours per day on feeding. A 6-meter shark takes the amount of 600 cubic meters/hour into their mouth and the amount of plankton filtered from the water is 2.8 kilograms per hour. In total 21 kilograms per day.

If you would like to see the whale shark at Richelieu rock, the best time of the year is from January till April. You can visit the dive site on a liveaboard trip or diving day trip. All these trips leave from Khao Lak.

If you like any information you can always contact us

GoPro HD video by Bertram Kuehl

Do you like this VDO ? Have a look at these great VDO’s of the Hawksbill sea turtle of Manta Ray


Similan Dive Center is a diving agency, run by a group of passionate local divers who come together to share our enthusiasm for diving as well as the love for nature. At Similan Dive Center, book from our meticulously handpicked and curated list of the most popular liveaboards and diving day trips.

With 19 years of experience, we offer a personal service, always trying to make that extra step. Get the best out of your diving holiday by contacting us by e-mail, telephone or just walk in at our shop in Khao Lak.


Similan Dive Center

67/7 Moo 5 Khuekkhak,
Takuapa, Thailand 82220
Phone: +66 831 761 306
Secondary phone: +66 76 490 965
Email: info@similandivecenter.com

Loacation map


Share This