1.Lion's Mane Jellyfish
2.Blue Whale
The blue whale (Balaenoptera musculus) is a marine mammal and a baleen whale. Reaching a maximum confirmed length of 29.9 meters (98 feet) and weighing up to 199 metric tons (196 long tons. 219 short tons), it's the largest animal known to have ever existed. The blue whale's long and slender body can be of various shades of greyish-blue on the back and somewhat lighter underneath.
Four subspecies are recognized: B. m. musculus in the North Atlantic and North Pacific, B. m. intermedia in the Southern Ocean, B. m. brevicauda (the pygmy blue whale) in the Indian Ocean and South Pacific Ocean, and B. m. indica in the Northern Indian Ocean. There's also a population in the waters off Chile that may constitute a fifth subspecies.
In general, blue whale populations migrate between their summer feeding areas near the poles and their winter breeding grounds near the tropics. There's also evidence of year-round residencies and partial or age- and sex-based migration. Blue whales are filter feeders. Their diet consists almost exclusively of krill. They're generally solitary or gather in small groups, with no well-defined social structure beyond mother-calf bonds. The fundamental frequency for blue whale vocalizations ranges from 8 to 25 Hz, and vocal production may vary by region, season, behavior, and time of day. Orcas are their only natural predators.
The blue whale was once abundant in nearly all of Earth's oceans until the end of the 19th century. It was hunted almost to extinction by whalers until the International Whaling Commission banned all blue whale hunting in 1966. The International Union for Conservation of Nature listed blue whales as endangered as of 2018. They continue to face numerous man-made threats such as ship strikes, pollution, ocean noise, and climate change.
3.Sperm Whale
4.Whale Shark
The whale shark is the world's largest living shark as well as the largest living fish. Whale sharks grow up to 45 ft (13.7 m) long and can weigh as much as 13 tons (11.6 tonnes). Their mouths alone are a whopping 6 ft (1.8 m) across. This is big enough to gulp down three percent of their body weight in food in one sitting.
In addition to eating planktonic (microscopic) prey, whale sharks will also take nektonic (larger free-swimming) species, including fish and squid, when they get the chance. Unlike their smaller cousins, these sharks are gentle giants. Their mouths have only one job: to suck in as much water as possible.
Once the mouth is closed, the water is forced out through the shark's gills. Spongy plates between the gill bars, the structures that support the gills, filter out anything larger than a few millimeters. This process keeps the food inside while allowing the water to exit.
Whale sharks prefer warm waters where plankton flourishes. They are frequently seen close to shore and sometimes enter lagoons or coral reefs where food is more plentiful.
5.Basking Shark
6.Giant Squid
The giant squid is a deep-ocean-dwelling species that belongs to the family Architeuthidae. These creatures are known for their immense size, which is a result of deep-sea gigantism.
Recent estimates suggest that females can grow up to 13 meters long, while males can reach up to 10 meters, measured from the posterior fins to the tips of their two longest tentacles. They are second in size only to the colossal squid, which may grow as long as 14 meters.
7.Giant Pacific Octopus
8.Oarfish
9.Ocean Sunfish
10.Japanese Spider Crab
Inhabiting the waters around Japan, the Japanese spider crab is a marine species known for having the largest leg span among all arthropods, extending up to 12 feet. It primarily feeds as a scavenger, consuming plant matter, decaying animals, and small sea creatures found on the ocean floor. The crab's long legs and armored body make it a distinctive presence in deep-sea environments.
