Huge whale shark glides casually past divers in 'The Trench' off West Palm Beach

Divers had a close encounter with a whale shark off the coast of West Palm Beach, Florida on Sunday.

Keith Brock was with his wife and two other divers when he first spotted the large sea creature.

"It was such a shock," Brock told Action News Jax.

See photos of one of the world's largest underwater animals​
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Ginormous whale shark casually glides past divers
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Ginormous whale shark casually glides past divers
[UNVERIFIED CONTENT] Donsol, Philippines, 2012
(GERMANY OUT) Female snorkeler swims with Whale shark, Rhincodon thypus, Seychelles, Africa, Indian Ocean (Photo by Reinhard Dirscherl/ullstein bild via Getty Images)
CEBU, PHILIPPINES - OCTOBER 05: Whale shark (Rhincodon typus) pictured in Bohol Sea, on October 05, 2014 in Cebu, Philippines. PHOTOGRAPH BY Andrey Nekrasov / Barcroft Images London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Andrey Nekrasov/ Barcroft Images / Barcroft Media via Getty Images)
CEBU, PHILIPPINES - OCTOBER 05: Whale shark (Rhincodon typus) pictured in Bohol Sea, on October 05, 2014 in Cebu, Philippines. PHOTOGRAPH BY Andrey Nekrasov / Barcroft Images London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Andrey Nekrasov/ Barcroft Images / Barcroft Media via Getty Images)
CEBU, PHILIPPINES - OCTOBER 05: Whale shark (Rhincodon typus) pictured in Bohol Sea, on October 05, 2014 in Cebu, Philippines. PHOTOGRAPH BY Andrey Nekrasov / Barcroft Images London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Andrey Nekrasov/ Barcroft Images / Barcroft Media via Getty Images)
CEBU, PHILIPPINES - OCTOBER 05: Whale shark (Rhincodon typus) pictured in Bohol Sea, on October 05, 2014 in Cebu, Philippines. PHOTOGRAPH BY Andrey Nekrasov / Barcroft Images London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Andrey Nekrasov/ Barcroft Images / Barcroft Media via Getty Images)
Woman swimming beside a huge whale shark in the clear blue ocean.
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This stunning Whale Shark (Rhincodon typus) image was captured at Koh Haa islands in the Andaman Sea, Krabi, Thailand. Numerous Cobia (Rachycentron canadum) aka Wahoo, can be seen swimming around the Whale Shark. Cobia can grow up to two meters long and are often mistaken for sharks. This image shows their primal instinctive behavior as they use the Whale Shark for both protection and to scavenge unwanted food. This is a particular strategy adopted by Cobia to ensure their success and survival. Whale sharks are pelagic fish who feed on plankton, small fish and are the largest of the extant species. They are classed as vulnerable to extinction on the IUCN red list, due to being hunted for their meat and liver oil, however are now a protected species.
Whale shark swimming near the surface in Cenderawasih Bay. Whale sharks here are thought to be resident all year round feeding by sucking nutrients from the fishing nets that hang below the fishing platforms(bagans).
Whale shark (Rhincodon�ypus), may grow to 18 m and weigh 40 000 kg. Ningaloo Marine Park, north of Carnarvon, Western Australia. (Photo by Auscape/UIG via Getty Images)
OSAKA, JAPAN: 'Kai' the whale shark opens his mouth for some treats fed to him by his keeper Hideto Nakagawa at the Kaiyukan aquarium in Osaka, western Japan, 17 March 2000. The rare six-meter long fish weighing about 2.7 tons has been attracting visitors since it came to the aquarium in 1995. (ELECTRONIC IMAGE) AFP PHOTO/Toru YAMANAKA (Photo credit should read TORU YAMANAKA/AFP/Getty Images)
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He says they encountered it while going for a dive in a local area dubbed "The Trench," a dive spot about 20 meters deep in the Atlantic Ocean.

After swimming closer to get a better look at the massive shark, Brock says the fish rang in at about 35 feet long.

Whale sharks, widely considered as one of the planets' biggest sea creatures, can grow up to 40 feet long and tip the scale with an average weight of 20 tons.

SEE ALSO: Teen girl survives attack from raging shark by sucker punching it in the face

A native to the Florida area and a frequenter at the dive spot, Brock says he's never seen an animal so large.

"It's the most amazing thing that's ever happened to me underwater," Brock said.

Fortunately for Brock and the other the divers, these mammals feed primarily on plankton, krill and other small creatures.

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