The Biggest Prehistoric Sea Monsters Ever Discovered

When it comes to zoology, the animals capable of growing the largest will almost always be those in the oceans. This is certainly the case throughout prehistory. Water buoyancy in the open seas can support much heavier animal weights, fighting against the force of gravity that would otherwise drag such large animals down. Large bodies can store fat an energy better, allowing giant marine animals to remain energised in the endless blue, where food may not be constantly available. But, in time gone by, who was the absolute largest of the large when it came to marine animals? Intoday's video, we'll be meeting the biggest recorded prehistoric marine mammal, reptile, invertebrate and fish, from four very different time periods. Sit back and relax, and dive in with us, if you dare. Our other channels 👇 🌎 Top5s: LISTS & HORROR https://www.youtube.com/channel/UCX51Dixddr5HuwLVBH9ykeQ 🔎 ColdCaseDetective: TRUE CRIME https://www.youtube.com/channel/UCdjslyNQupPSFxK_mSPcG-g? 🪖 WarsofTheWorld: MILITARY HISTORY https://www.youtube.com/channel/UCB29sxIJ9PQIo0hCnIaOMbg 👽 DestinationDeclassified: ALIENS & UFOs https://www.youtube.com/channel/UCfxuwHJ4cQHgf1ez7662_fQ 🪐 AccessAstronomy: SPACE & ASTRONOMY https://www.youtube.com/channel/UCpbMdDya7ubh013QGe0JqHA/featured ⚔️ MedievalMadness: MEDIEVAL HISTORY https://www.youtube.com/channel/UCWoMpx18YeSVuI7ObqEk8eg Written, Researched & Presented by: Thomas McGlynn Thanks for watching. DISCLAIMER: All materials in these videos are used for entertainment purposes and fall within the guidelines of fair use. No copyright infringement is intended. If you are, or represent the copyright owner of materials used in this video, and have an issue with the use of said material, PLEASE email us before putting in a claim and we can resolve the issue immediately. We can be reach on this email: [email protected] Copyright © 2026 Top5s All rights reserved.