1. Shoelace worms
Maximum length: ~ 55 m / 180 ft15 m / 50 ft: North Sea
Average 长度:~
Natural habitat
Longest subspecies: No subspecies
The shoelace worm is the longest animal in the world. The shoelace worm is a banded worm that can reach a staggering 55 meters or 180 feet in length while only 10 millimeters or 0.4 inches in width. They are also known for producing highly toxic mucus, through which they are able to kill predators. Shoelace worms can naturally be found in the North Sea of Northern Europe. These worms are rare on land, although strong storms can sometimes wash them ashore.
2. Praia
Maximum length: ~ 50 m / 164 ft 40 m / 131 ft: In the deep sea, all the oceans on Earth
Average 长度:~
Natural habitat
最长的亚种: Praya Dubia / 巨型管水母
Praya is the second longest animal on the planet and at the same time the average longest. Praya is a tube jellyfish, meaning a deep-sea colonizing animal, that lives in an animal-like community consisting of many individual organisms, each of which performs a different function. They are capable of producing blue bioluminescence, through which they attract prey, mainly small crabs and fish, and then they sting their prey with their venomous tentacles, thus killing or paralyzing the prey. The Praya Dubia subspecies, better known as the giant tube jellyfish, can reach up to 50 meters or 164 feet in length. These colonized animals live in the deep ocean up to 1,000 meters below sea level in all the oceans of the planet.
3. Lion's mane jellyfish
Maximum length: ~ 37 m / 121 ft10 m / 33 ft: Arctic Ocean, North Atlantic Ocean, and North Pacific Ocean
Average 长度:~
Natural habitat
Longest subspecies: No subspecies
The lion's mane jellyfish is the third longest animal in the world. With tentacles that are about 37 meters or 121 feet long, the lion's mane jellyfish is the longest jellyfish species in the world. Its long tentacles are also equipped with venomous stinging cells, allowing jellyfish to capture prey. Jellyfish get their name from their hair-like tentacles, which resemble the mane of a lion. Lion's mane jellyfish occur naturally in the cold waters of the Arctic Ocean, North Atlantic, and North Pacific Ocean.
4. Baleen whales
Maximum length: ~ 33 m / 108 ft 20 m / 65 ft: In all the oceans of the planet
Average 长度:~
Natural habitat
Longest subspecies: blue whale
5. Toothed whales
Maximum length: ~ 21 m / 69 ft 10 m / 33 ft: In all the oceans of the planet
Average 长度:~
Natural habitat
Longest subspecies: sperm whale
The toothed whale also ranks among the top five longest animals in the world. Two subspecies of toothed whales are characterized by their huge body length, with the sperm whale being the longest subspecies of toothed whale, reaching up to 21 meters or 69 feet in length, with the beaked whale coming in second. Many subspecies of the toothed whale have their natural habitat in all the oceans of the planet.
6. Whale sharks
Maximum length: ~ 19 m / 62 ft 8 m / 26 ft: Atlantic, Indian and Pacific Oceans
Average 长度:~
Natural habitat
Longest subspecies: No subspecies
The whale shark is the sixth-longest animal in the world. As the largest fish in the ocean, whale sharks can grow up to 19 meters or 62 feet long, making them the longest fish in the world. Filter-feeding sharks get their name from their size and length, so they can rightly be called "whales of sharks". Whale sharks occur naturally in the Atlantic, Indian, and Pacific Oceans, usually in tropical waters.
7. Emperor ribbon fish
Maximum length: ~ 17 m / 56 ft3 m / 10 ft: In the deep sea, all the oceans on Earth
Average 长度:~
Natural habitat
Longest subspecies: Giant Ribbon Fish
The emperor ribbon fish is the seventh longest animal in the world. The emperor ribbon fish is characterized by a long torso, which makes them the longest bony fish on the planet. The longest subspecies of kingfish is the giant kingfish, which can reach up to 17 meters or 56 feet in length. The king ribbon fish is a deep-sea fish that lives between 250 and 1000 meters below sea level, so it is rarely seen or caught by humans. In Japanese mythology, the emperor ribbon fish does have the legendary status of an "earthquake fish", linking the sight of the emperor ribbon fish close to the surface of the sea with an imminent earthquake.
8. Giant squid
Maximum length: ~ 14 m / 46 ft 10 m / 33 ft: In the deep sea of the South/Antarctic Ocean
Average 长度:~
Natural habitat
Longest subspecies: No subspecies
9. Giant squid
Maximum length: ~ 13 m / 43 ft 9 m / 30 ft: In the deep sea, all the oceans on Earth
Average 长度:~
Natural habitat
Longest subspecies: No subspecies
The giant squid is the ninth longest animal in the world. With huge eyes and tentacles, the giant squid is second only to the giant squid, which can grow up to 13 meters or 43 feet long, and is therefore only slightly shorter than its giant squid cousin. Giant squid are more common as compared to giant squid because they are found in all the oceans of the earth. However, they are also deep-sea animals, so humans rarely see them.
10. Basking sharks
Maximum length: ~ 12 m / 39 ft
Average length: ~ 8 m / 26 ft
Natural habitat: Atlantic and Pacific Oceans
Longest subspecies: No subspecies
Basking sharks complete the ranking of the ten longest animals in the world. Basking sharks are the second and third longest fish in the world, reaching up to 12 meters or about 39 feet in length. Basking sharks are filter-feeding sharks, and their main feature is that they swim with their mouths open, filtering plankton from the water. The natural habitat of basking sharks is in the Atlantic and Pacific Oceans, especially in coastal areas.
Top 10 longest animals in the world:
| Maximum length: | Average length: | Longest subspecies: | |
| 1. Shoelace worms | ~ 55 m / 180 ft | ~ 40 m / 131 ft | No subspecies |
| 2. Praia | ~ 50 m / 164 ft | ~ 40 m / 131 ft | Praya Dubia / 巨型管水母 |
| 3. Lion's mane jellyfish | ~ 37 m / 121 ft | ~ 10 m / 33 ft | No subspecies |
| 4. Baleen whales | ~ 33 m / 108 ft | ~ 20 m / 65 ft | blue whale |
| 5. Toothed whales | ~ 21 m / 69 ft | ~ 10 m / 33 ft | sperm whale |
| 6. Whale sharks | ~ 19 m / 62 ft | ~ 8 m / 26 ft | No subspecies |
| 7. Emperor hairtail | ~ 17 m / 56 ft | ~ 3 m / 10 ft | Giant king ribbon fish |
| 8. Giant squid | ~ 14 m / 46 ft | ~ 10 m / 33 ft | No subspecies |
| 9. Giant squid | ~ 13 m / 43 ft | ~ 9 m / 30 ft | No subspecies |
| 10. Basking sharks | ~ 12 m / 39 ft | ~ 8 m / 26 ft | No subspecies |