# 10 Weird Creatures Found in the Deep Sea in 2021  URL:: https://www.livescience.com/weirdest-deep-sea-creatures-2021 Author:: Harry Baker  ## AI-Generated Summary The deep sea in 2021 revealed mysterious creatures like a blood-red jellyfish, a glass octopus, and a shape-shifting whalefish. Scientists discovered new species such as the Emperor Dumbo octopus and a real-life SpongeBob and Patrick duo. Rare sightings included an alien-like spindly squid, a giant phantom jellyfish, and sponge tracks on the seafloor. ## Highlights > Lots of deep-sea creatures have evolved a similar red color because red wavelengths of light do not penetrate into the deep ocean. This means that red animals appear black because there is no red light to reflect back toward potential predators. ([View Highlight](https://read.readwise.io/read/01hynaexg6enf73ekbj4jpcg5j))