10 BIGGEST Ocean Creatures In The World! | Summary and Q&A

TL;DR

This content features a list of the 10 largest creatures in the ocean, including the blue whale, sperm whale, whale shark, and Japanese spider crab.

Key Insights

• 🏃‍♂️ Human activity, including climate change, overfishing, and pollution, has contributed to the promotion of lion's mane jellyfish populations while reducing the population of their predators.
• 🔵 Blue whales are the largest animals on Earth and have a significant impact on the marine ecosystem. They are near extinction due to commercial whaling.
• 🧠 Sperm whales have the largest animal brain and were heavily hunted for their valuable waxy substance, sperma.
• 💗 Whale sharks are social creatures that can grow up to 60 feet long. They are hunted for their fins but are also important filter feeders in the ocean.
• 🦶 Basking sharks are the second-largest fish in the modern ocean, reaching up to 40 feet in length. They are friendly creatures that primarily feed on plankton.
• 😃 Giant squid, with a length of up to 39 feet, have the largest eyes in the animal kingdom and are known for their association with sea monster tales.
• 💗 The giant Pacific octopus is an intelligent cephalopod that can grow over 32 feet in size. They are found across the Pacific and have remarkable problem-solving skills.
• 🐳 Humpback whales are filter feeders known for their songs and yearly migrations. They were nearly hunted to extinction but have since recovered.
• 🙈 Oarfish, the longest bony fish on Earth, live in deep, dark waters and are rarely seen alive. They are not dangerous to humans and feed on plankton.
• 🏯 The Japanese spider crab is the largest living arthropod, with a leg span of over 12 feet. These scavengers live in the Pacific side of Japan and have distinct features.

Transcript

Read and summarize the transcript of this video on Glasp Reader (beta).

Questions & Answers

Q: What makes the lion's mane jellyfish an excellent predator?

The lion's mane jellyfish has long, poison-equipped tentacles that it extends to create a trap for capturing crustaceans and fish. These appendages make it an excellent predator, although they can also be entangled in marine debris or attacked by predators due to the taste of their arms.

Q: Why are blue whales near extinction?

Blue whales are near extinction due to commercial whaling. There are currently fewer than 25,000 individuals left, which is a significant decline from their previous population. They were hunted for their blubber and oil in the past.

Q: How do sperm whales use their large heads?

Sperm whales have large heads that contain a waxy substance called sperma. This substance was highly valued in the past as it was used to produce cosmetics, lamp oil, soap, and other commercial applications. The whales were hunted massively for this substance.

Q: What is the main threat to whale sharks?

Whale sharks are listed as endangered because they are hunted for their fins, which are considered a delicacy in some parts of Asia. Despite their large size, whale sharks are filter feeders, opening their jaws to filter everything that crosses their path.

Summary & Key Takeaways

• The lion's mane jellyfish is one of the biggest creatures in the ocean, with tentacles reaching 120 feet. It hunts by using its long poisonous tentacles to trap prey.

• The blue whale is the largest animal on the planet, weighing up to 441,000 pounds and consuming about four tons of krill daily.

• The sperm whale is the world's largest tooth predator and can make a clicking sound that can be heard from 230 decibels underwater. These whales were heavily hunted for their waxy substance, sperma, in the past.