Here is our list of the top 10 weirdest deep-sea creatures seen in 2021. Blood-red jellyfish This mysteries red jelly may be a new species previously unknown to science, NOAA researchers say.

Brent Durand / Getty Images. There are more than 1,200 species of sea anemone in the ocean and these creatures are responsible for some of the most stunning colors and shapes you'll find underwater.

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Environment Animals 10 GIFs Of Deep-Sea Creatures Encountering A Sub. Never-before-seen images from a recent expedition to the ocean floor. By Rose Pastore. Published Mar 22, 2019 10:08 PM EDT.

The animals like to bury themselves in the sand during the day. They do this as cutely as they do everything else, sinking into a depression and then throwing sand on themselves with their tentacles.

Humans know of about 245,000 marine species. The most common sea animals are those without a backbone, such as jellyfish and shrimp. There are thousands of species of jellyfish and shrimp.

The animals like to bury themselves in the sand during the day. They do this as cutely as they do everything else, sinking into a depression and then throwing sand on themselves with their tentacles.