People have been left in disbelief after seeing how big bluefin tuna fish really are, and they truly are like sea monsters.

I’m going to assume that we’re all familiar with tuna and how it can come in many forms such as a steak, fillet, and even in cans to make a sandwich.

So when you think of the actual fish, it’s hard to imagine anything too big, and perhaps something that you might find in a river, right?

Well, it turns out that they’re actually a lot bigger than you think, and pulling one in while out fishing would take quite a lot of strength.

Bluefin tuna are massive. Credit: Tomohiro Ohsumi/Getty

A video is currently circulating on X (formerly Twitter) of a fisher reeling in her catch, and the size of the tuna she has caught has left people stunned.

As the fish, described as a bluefin tuna, is raised into the air, it’s clearly bigger than the average person and almost looks the size of what you’d expect a shark to be.

As per WHDH, Michelle Bancewicz Cicale reeled in the fish in New Hampshire, and after it had its tail and guts removed, the tuna measured nine feet long and weighed 600 lbs.

Naturally, people flocked to the comments with their amazement.

One person joked: “I never knew tuna were this big. How do they make them fit into those little cans?”

A second said: “Tuna being this massive will always throw me off,” while a third added: “Never knew Tuna was so humongous. This is literally the size of a Great White Shark.”

Watch the incredible catch below:

A third recalled their own experiences with the fish: “I had no idea how big tuna fish were until I visited the fish market in Tokyo years ago. Back then, it was in Tsukiji, Tokyo. The fish market moved and is now in Toyosu, Tokyo.” They attached pictures they had taken at the time, confirming that tuna are indeed massive.

According to National Geographic, bluefin tuna can grow to 6.5 feet in length and weigh a whopping 550 lbs – which could fill a lot of sandwiches.

That being said, the website confirms that tuna over 6.5 feet are not uncommon and they can travel around 43mph in the water.

Oceana states that Atlantic bluefin tuna can grow to a staggering 13 feet and weigh around 2,000 lbs.

However, in the 1970s demand for bluefin tuna soared, particularly in Japan, which meant that overfishing caused their numbers in the wild to dwindle and there are now international conservation efforts to protect them