Watch This Giant Goliath Grouper Help a Diver Find and Take Out an Invasive Lionfish

National Park Service diver Paul O'Dell against an Atlantic Goliath Grouper at Dry Tortugas National Park.
© Brett Seymour, Public domain

Written by Hannah Crawford

Updated: October 19, 2023

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It seems quite odd to hear the phrase “giant Goliath grouper.” As we already know, the word giant implies that this fish is large. However, this Goliath grouper seems larger than life! He seems even bigger than normal Goliath groupers. And this giant is attempting to help this diver.

A Big Helper

The next YouTube video takes us to the depths of the ocean. Where a big helper is striving to assist this diver with finding an invader. The YouTube page Diver Sherwood uploaded this video. This channel is dedicated to providing footage of animals such as a moray eel, nurse shark, lemon shark, stingray, and triggerfish, to name a few. Among these, we see a giant Goliath grouper who is trying to help this diver!

Are Goliath Groupers Friendly?

Giant grouper

Giant groupers can measure 8.2 feet long.


It’s important to remember, before we dive into this video posted below that goliath groupers are enormous fish. These whopper-size fish are known to reach up to 800 pounds! And as we know, animals that are that large are bound to be able to do some damage. Some research, such as the National Oceanic and Atmospheric Administration, refers to Goliath groupers as “gentle giants.” And gentle though they may be, it’s important to appreciate their massive size. 

According to the For Scuba Divers organization they state that “Goliath groupers are considered to be one of the largest fish in the sea bass family. They are not known for attacking humans, but they are known to eat whatever fits in their mouths. So, if you are diving near them be mindful of the possibilities.” 

An Invader is Found

At the start of this video, we see a diver who has found a lionfish that is somewhere it doesn’t belong. While the lionfish might blend into his surroundings well, we can see his long spines. These spines aren’t just there for looks, either. These are venomous spines. 

According to the  Florida Fish and Wildlife Conservation Commission, “​​Lionfish have 18 venomous spines that are used defensively against predators. These spines should be avoided during capture and handling because of their ability to cause painful injuries. Thirteen long venomous spines are located along the front of the dorsal fin, which is located on the top of the fish.” 

So, we can see just how careful this diver is trying to be. During this attempted capture, we see this giant Goliath grouper help the diver find this culprit. 

Check Out the Incredible Video Below!

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About the Author

Hannah Crawford is a writer at A-Z Animals where she focuses on reptiles, mammals, and locations in Africa. Hannah has been researching and writing about animals and various countries for over eight years. She holds a Bachelors Degree in Communication\Performance Studies from Pensacola Christian College, which she earned in 2015. Hannah is a resident in Florida, and enjoys theatre, poetry, and growing her fish tank.

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