Meet Nine of the Strangest Deep Sea Creatures That Are Almost Aliens

Written by Zeek Lepakko
Published: August 27, 2023
Share on:

Ever heard the phrase “terrors of the deep”? There are certainly a vast amount of odd creatures that lurk beneath the waves, possibly some we haven’t even discovered. In the video below, we’re shown nine separate encounters with a quirky variety of critters found in the depths near Alaska. This haunting footage was captured and analyzed by the pros at NOAA, during a set of recent explorations.

Among the curiosities shown, we definitely get a variety of jellyfish, comb jellies, and even a vertically aligned fish (identity unknown!). The depths that these creatures were sighted are also noted, which helps to give us an idea of the environment each calls home.

Let’s find out more about some of these otherworldly creatures and what we do currently know about their enigmatic natures.

What Kind of Creature Is the Jellyfish?

Jellyfish with neon glow light effect in sea aquarium in Sentosa, Singapore

Jellyfish are made of around 95% water!

©I Wei Huang/

Many may see the bizarre jellyfish as an anomaly in the animal kingdom. They don’t have a brain, and are shockingly simple in their construction. Despite this, they’ve been around for millions of years, so they must be doing something right! Jellyfish come in a rainbow of colors, and can often have the ability to produce bioluminescence – they glow!

Even though they have plenty of flashy features, these showy swimmers are largely a nervous system with a digestive system. They reproduce using a system that could definitely be considered “unique“, to say the least. Another peculiar claim to fame some species sport is venomous stingers, used for both offense and defense.

Even this isn’t all of the weirdness these oceanic blobs are capable of, but it starts becoming very clear why jellyfish look kind of like aliens!

What Is a Comb Jelly?

Comb jellies, whose true name is ctenophores, are a group of marine animals that are found in a wide variety of ocean environments. Although their name and bodies are similar, comb jellies are not closely related to jellyfish. They belong to a separate phylum, Ctenophora, and there are several key differences between the two groups.

For example, one of the most distinctive features of comb jellies is the rows of cilia along their bodies. These cilia beat in coordinated waves, propelling the comb jelly through the water. This also happens to create a beautiful, shimmering effect while moving, due to refracting light. Did you know that due to their appearance, comb jellies are sometimes called “sea walnuts” or “sea gooseberries”?

Surf Into These Odd Findings

The photo featured at the top of this post is ©

Share on:
About the Author

Zeek is a writer at A-Z Animals primarily covering wildlife in Africa and international travel. Zeek has been studying animals for over 15 years and holds an Associate's Degree in Arts from Lone Star Montgomery, earned in 2011. A resident of Washington, Zeek enjoys designing video games and training his Shiba Inu, Cheems.

Thank you for reading! Have some feedback for us? Contact the AZ Animals editorial team.