Some sharks are so small that they can fit inside your pocket. "Deep Blue" is not one of those sharks, unless you are a giant who lives in a castle in the sky. 
 
 Deep Blue, one of the largest great whites ever filmed, is featured in a new video that was uploaded to Facebook this week. 
 
 Deep Blue (The biggest shark ever filmed) second partAnother DEEP BLUE VIDEO!!!!(Please read below about our fundraising campaign)Otro video de DEEP BLUE!!!!(Por favor lean el enlace de abajo acerca de nuestro proyecto) Posted by Mauricio Hoyos Padilla on Monday, August 10, 2015 
 
 The video comes from Mauricio Hoyos Padilla, a shark expert from the Mexico-based shark conservation and research non-governmental organization known as Pelagios-Kakunjá. Padilla guesses that the 20-something-foot shark is the largest ever caught on camera. 
 
 Padilla, who released an earlier Deep Blue video in June, said in a statement accompanying the new video that a shark of this size must be more than 50 years old. Deep Blue's appearance, he added, "tells me protection and conservation efforts are really working." 
 
 However, Padilla is concerned that Deep Blue will soon find herself in danger, when the pregnant female leaves the relative safety of Guadalupe Island and heads toward the more shallow coastal areas where great whites give birth. 
 
 [This is a pocket shark] 
 
 The nursery areas are "full of food and free of predators," he writes. But, he adds, "these areas are close to shore and very vulnerable to several human threats." Padilla and his team are at Guadalupe this summer to tag the pregnant females living there, in order to track them to their nursery grounds. The idea is to learn more about the shores where sharks give birth, in order to recommend better protection policies. 
 
 LiveScience spoke with Padilla in June, after a video was released showing Deep Blue appearing to high-five a diver. (The diver was, in fact, trying to push the shark away from the diving cage's sharp edges.) 
 
 Here, according to the LiveScience piece, is how Padilla and other researchers first found her: 
 
 He has been studying sharks off Guadalupe Island, off the coast of Mexico, for about 13 years. The island is known as a great white shark breeding ground in the Pacific Ocean. Hoyos Padilla had a new hypothesis that the pregnant females would wait for elephant seals to arrive in the waters there in November and December, so the sharks could ambush the seals for sustenance. He found the female sharks could ambush the seals at a depth of 330 feet (100 meters). For his study he needed to observe pregnant female sharks, so he asked operators of ecotourism boats in the area to keep an eye out and contact him if they spotted one. Sure enough, a friend and dive master contacted him with Deep Blue's whereabouts. 
 
 Last year was the first time the shark and the researcher encountered each other. That footage ended up airing during Discovery Channel's Shark Week. Researchers have tagged Deep Blue with a transponder, so she's much easier to find. 
 
 Great whites are listed as "vulnerable" on the International Union for Conservation of Nature's Red List, meaning that the global conservation group believes the species is likely to become endangered unless conditions improve. Although the sharks live across the world's oceans, they also face widespread threats, especially from humans. 
 
 The IUCN's assessment reads: 
 
 "Threats to the species include targeted commercial and sports fisheries for jaws, fins, game records and for aquarium display; protective beach meshing; media-fanned campaigns to kill Great White Sharks after a biting incident occurs; and degradation of inshore habitats used as pupping and nursery grounds." 
 
 Here's another look at Deep Blue: 
 
 DEEP BLUEI give you the biggest white shark ever seen in front of the cages in Guadalupe Island....DEEP BLUE!!!Este es el tiburón blanco mas grande visto desde las jaulas en Isla Guadalupe...DEEP BLUE!!! Posted by Mauricio Hoyos Padilla on Tuesday, June 9, 2015 
 
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 The Australian researcher who says his government’s shark policy bites because it’s based on ‘Jaws’ ||||| EASTHAM — Six-year-old Blake White, who was fishing with his family off Rock Harbor in Cape Cod Bay Saturday, asked his dad for some help reeling in what they thought would be a massive striped bass. 
 
 But after over an hour of being towed around the bay, the fish that came to the surface next to their Aquasport was a great white shark, not a striped bass. 
 
 “‘We're going to need a bigger boat,’” Lars White said he told his family onboard the 22-foot center console boat. “The reaction was to ask the boys to go to the center of the boat and sit down.” 
 
 The shark hadn't bit the line, it swam into the hook and spent an hour and a half trying to free itself, according to White. 
 
 Watch a video interview with the family who hooked the great white 
 
 When the shark finally surfaced, Lars' wife, Niccole, took some photographs of their only catch of the day and then they cut their line and the shark swam away. Blake had hooked into the shark, which his father estimated was 10-12 feet long, at about 1:15 p.m. about a mile from Rock Harbor on the Eastham side, Lars White said. 
 
 Blake, his 8-year-old brother Pierce, and their grandparents were excited when they saw the shark, but made sure they stayed away from the sides of the boat, Lars White said. Lars White and his family live in Houston, Texas but his parents live in Eastham. 
 
 White sent photos of the shark to the Atlantic Great White Shark Conservancy, a non-profit that researches the sharks off Cape Cod. State shark scientist Gregory Skomal confirmed in an email that he was aware of the report and that the shark in the photograph provided by White was a great white. 
 
 Great white sharks have been spotted in increasing numbers in recent years around Cape Cod but primarily along the beaches of the Outer Cape on the Atlantic Ocean side of the peninsula. There were at least five great whites in Wellfleet Harbor starting in July 2015, according to data from receivers moored throughout the harbor that detected the unique identifying signals broadcast from acoustic tags on the animals a total of 6,564 times. 
 
 That makes the Outer Cape harbor the number two spot on the Cape for detections from the 65 great white sharks Skomal and his team have tagged over the past six years, behind only Chatham among towns and areas monitored from Southeastern Massachusetts all the way up to Cape Ann. 
 
 But there have been no reports of somebody hooking into a great white so deep into Cape Cod Bay. Rock Harbor is located in the inner elbow of the peninsula a short distance from the popular Skaket Beach in Orleans in an area with significant tidal changes. During low tide much of the flats just outside the harbor is exposed. 
 
 An area off Jeremy Point in Wellfleet is frequented by a large population of seals but the animals, which are a primary source of food for great white sharks, are not often seen closer to Rock Harbor. 
 
 The family didn't notice any seals in the area where they were trolling for bass, White said. 
 
 “Blake was telling the story about how it was his fish and he needed a little help to reel it in,” White said. 
 
 He wants to go fishing again next weekend, but told his father “maybe we can catch something a little bit smaller.” 
 
 Read more about sharks on Cape Cod: capecodtimes.com/sharks 
 
 — Follow Haven Orecchio-Egresitz on Twitter: @HavenCCT
– Don’t be surprised if this beast appears in your nightmares tonight. Shark expert Mauricio Hoyos Padilla has released footage of a massive, 20-foot-long great white shark that might just be the largest ever caught on camera, reports ABC News. Though Padilla says he first found the shark near Guadalupe Island off the Mexican coast in 2013, it isn't clear when this video was recorded; an earlier video of the shark appearing to high-five a diver was released in June. Nicknamed "Deep Blue," the female shark is estimated to weigh 5,000 pounds and was believed to have been pregnant when the footage was taken. It shows Deep Blue approaching a cage of divers before swimming toward a camera—seemingly with a smile on her face. "A shark of that size is at least 50 years old and that tells me protection and conservation efforts are really working," says Padilla of nonprofit marine research organization Pelagios-Kakunjá. "Deep Blue has been spared from longlines and the inherent dangers of being in the wild, and somehow she has found her way in the vast ocean." Though great white sharks often visit Guadalupe Island to feed on seals in November and December, Padilla says they head to shallow waters to give birth. "These areas are close to shore and very vulnerable to several human threats," he says, per the Washington Post. The video of Deep Blue, who is tagged, has tallied 2.7 million views since it was posted on Facebook on Monday. (This heartwarming video shows a great white rescue.)