Bulldog Fish- Ancient Extinct Fish

Humans are curious creatures, so they work on many projects to explore the world’s mysteries. From stepping on the moon place to diving into oceans, they did all to satisfy their curiosity. Humans’ attempts bore fruit, and they learned about many mysteries, but still, their circle of fulfillment was not filled.

Every new day brings new questions, which also become the reason for them to live. They discovered ancient civilizations, hidden places, space, new planets, and fossils of creatures that lived millions of years ago on Earth, but all the time, their discoveries end with new questions. Bulldog fish is also a mystery that still has many question marks after much research.

On behalf of the present data, we will provide a short and unique trip to help you satisfy your curiosity about the topic.

What Is A Bulldog Fish?

It is a giant fish that roamed in Earth’s water in the last stage of the Dinosaur Era (Cretaceous). The research claimed that this era ended 66 million years ago due to massive explosions. The reason behind this explosion was an asteroid, not a volcano.

Returning to the topic, the era was known as the era of giants. It is because most creatures were strong and huge at that time. This fish was one of them. It was a streamed body fish with a mouth that could open on a high level (as a bulldog opens its mouth). Its streamed body helps it to swim fast and accurately.

It will 100% right to say that it lived in deep water, but some research also claims that it lives in shallow areas of water. It is because all giant fishes are found in deep water, but we cannot restrict them to staying underwater. They can emerge into shallow water without warning and grab their prey. Studying their fossils proves that they also lived in freshwater resources.

Body Adaptations


When it comes to a giant marine fish, its teeth and devil look must be added in chat. The teeth of this fish look just like the teeth structure of piranhas. Two upper front teeth are smaller, while the lower front two teeth are almost three times bigger than the upper one. It helps them to hold their prey so that it can never escape after coming into its grip.

Further, all its teeth are sharp as knives and pointed, which invade the prey’s body and make it motionless.


By examining the skeleton deeply, humans can talk about its length. Its length may vary from 16 to 20 feet. More than 20 feet is just a theory, and there is no evidence to prove it.

For example, the bulldog fish skeleton discovered also contains another skeleton of 6 feet in its abdomen. Just a fantastic phenomenon occurs by Mother Nature.

Facts You Must Know About It

  1. Different sources claimed bulldog fish as “Xiphactinus,” which means “sword ray.” “Xiphacttinus” is a fish type with the same adaptations as this fish contains. Its name is due to its ending fins on a streamed body, which makes an illusion of a” sword.”
  2. If you are well-known about “Xiphactinus,” you might think I’m talking about the wrong fish, but it’s a fact. According to the present research on the topic, I did not feel wrong. As discoveries will happen, we will update it.
  3. You might be shocked to know that this fish has no scientific presence. It’s an informational name. This name was due to its (Xiphactinus) mouth, which looks like a bulldog mouth. When it opens, the downside of the mouth opens horizontally while the upper side opens vertically. It enables them to open their mouths on a massive size.
  4. Another fact to know about fish is that it has no original image. All available images are designed by considering their skeleton in mind. Yes, I am providing you with genuine knowledge after doing great research (continue) about it. Just the fossils of this fish are available to see.

Discovering fossils is also based on amazing events. Let’s have a little chat about it.

Important Note:


Ichthyodectiforms is an order of taxonomy that contains a group of fishes that were extinct in the age of dinosaurs. All the fish types of this order are the same in physical adaptations. It was the same era when it was extinct.

They contain adaptations of this fish, such as their fins being arranged similarly; their mouth resembles a bulldog mouth, and their teeth and body size are quite the same.

Process Of Discovering Its Fossils

It is a prehistoric fish. Prehistoric refers to the era before written records. Without written records, all information is just estimates, and we need to do a lot of research on such topics.

Fossils Of Bulldog Fish

Fossils of bulldog fish were found in different regions and water resources, which shows these fishes were also the giants of rivers (freshwater). First, I want to talk about a Nebraska fisherman “Andy Moore” who grabbed the skeleton. He participated in a fishing competition that was held at the Missouri River.

When Moore hooked a strong thing, he was so happy that he found a treasure. He called the army corps, which was controlling that river area. He sent them some images to prove himself right. So, he received a call about a geologist coming to check it out.

According to Moore (Interview), he came and dived at a selected spot. The geologist completed his research and claimed it was a 90 million-year-old skeleton of an ancient fish.

After that, the skeleton was sent to the Lewis and Clark Vistors Centre in Crafton, Nebraska. Moore was so happy while sharing it. He also said, “a fisherman catches a prehistoric fish,” with a blushing face.

Rather than it, many other skeletons were found. Their size varies from 15 to 20 feet. One skeleton had another skeleton of an undigested fish in its abdomen. Its size was about 6 feet. George Sternberg made this discovery.

The fish in its abdomen was a Gillicus. Amazingly, another skeleton was discovered, which contained a small skeleton of another creature in its gut. Such notable events, aren’t they?

Discovery Of Mr. Kerry Geddes

Mr. Kerry Geddes was a researcher at the UQ School of Biological Sciences. He said he saw a nodule of sand at the same place where they discovered the skull of “Isisfordia duncani.” Isisfordia duncani was the first modern crocodilian to be discovered.

Kerry said; I struck the nodule with the help of a hammer, and I was astonished to see a skull-like front part of the body. I, with my team, thought it would be a meter long under, but it was not.

Another school researcher (Rodney Berrell) studied it with experts from Japan and Mexico. They complete their process and discover that the fossil belongs to Cladocyclus, a type of Ichthyodectiform.

You must go and watch “Ichthyodectiform.” You will also enjoy seeing these skeletons look the same as this fish. All physical adaptations from fins to mouth will force you to think it’s a bulldog fish skeleton.

Further, Mr. Barrell said this is the first discovery of Cladocyclus in Australia, which shows that they were also the inhabitants of fresh water.

Another Expert, Dr. Steven Salisbury, studied the bones of that fossil. He proved right the discovery of Mr Barrell.

Summing Up

The topic is under black shadow, just as 95% of marine life remains. Experts are working on it to explore all about it, but you must take it to your knowledge that the fish have no presence in records. It is a formal name, just as we use nicknames for any specific characteristic.

As it’s a prehistoric creature, it needs more accurate research. You may disagree with us at some points, and we will appreciate it. Write your objections (if you have any) in the comment box. We will appreciate your efforts.

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