게시일: 2026 년 4 월 26 일 (일요일)
Giant octopuses may have ruled the ancient oceans 100 million years ago, when dinosaurs roamed the Earth, according to groundbreaking new research. Scientists from Hokkaido University in Japan have discovered fossil evidence suggesting these remarkable creatures could reach lengths of up to 19 metres, potentially making them the largest invertebrates ever known to science.
For decades, paleontologists believed that the largest ocean predators were vertebrates with backbones, such as fish and reptiles, while invertebrates like octopuses played supporting roles. This new study challenges that long-held assumption and reveals a fascinating chapter in marine evolution.
Ancient Ocean Giants
The research team analyzed remarkably well-preserved fossil jaws that provide unprecedented insights into these ancient creatures. Their analysis suggests the octopuses had body lengths of about 1.5 to 4.5 metres, and when including their long arms, the total length reached approximately 7 to 19 metres.
Even at the lower end of this size range, these animals would have been enormous by today’s standards. The Giant Pacific Octopus, the largest living species today, has an arm span of only about 5.5 metres.
Advanced Predatory Abilities
These ancient octopuses were powerful predators equipped with strong arms for grabbing prey and beak-like jaws for crushing the shells and bones of other animals. The fossilized jaws show uneven wear from left to right, suggesting the animals may have favored one side when feeding—a trait linked to advanced brain function in living creatures.
Modern octopuses are already known for their extraordinary intelligence, problem-solving abilities, and complex hunting strategies. These ancient relatives likely possessed similar traits on a much larger scale.
📌 한국어 요약
일본 과학자들이 1 억 년 전 공룡 시대 바다에 서식했던 19 미터 크기 거대 문어 화석을 발견했습니다. 이 문어는 등뼈가 없는 무척추동물 중 가장 컸을 것으로 추정되며, 강력한 턱과 다리로 물고기와 해양 파충류를 사냥했던 것으로 보입니다.
📚 핵심 단어
- Invertebrate: 척추가 없는 동물 (문어, 오징어 등)
- Paleontologist: 화석을 연구하는 고생물학자
- Fossil: 화석, 고대의 생물 유해
- Predator: 포식자, 사냥하는 동물