Dunkleosteus Minecraft Aquarium
Dunkleosteus! A great choice, but also one of the largest animals currently in the mod. Thus, it took me quite some time to create an adequate exhibit. Now that it’s made, I’ll discuss it here, going over some palaeontology, aquarium science, and Minecraft build tips!
Dunkleosteus is an incredibly famous animal, best known for its immense armored skull - the only part of the body preserved in fossils. I would argue that aside from megalodon, it is easily the most famous extinct fish of all time. It lived in the Late Devonian, about 360 million years ago, and is easily the largest animal known from this time. It was an active pelagic predator, comparable to many sharks today.
Dunkleosteus belongs to a group of fish we call the Placoderms, a group united by the armored plates that cover their heads. Though the earliest placoderms were jawless, the lineage which led to Dunkleosteus developed jaws. Though the placoderms were once considered an extinct, primitive group of fish, we now know that they were ancestral to all jawed vertebrates. That means that you, yes you, are a living placoderm!
The armored head plates of the early placoderms developed with time into our modern skulls, but the degree to which this armor was internal vs external is hotly debated. Most depictions of Dunkleosteus restore it with a fully external skull, though this is unlikely. The Prehistoric Nature mod takes a very different route, depicting the armor as fully internal, completely covered by thick soft tissue such that it is indistinguishable from the rest of the body. Perhaps something in the middle is more likely, such as what is seen in armored catfish today. Additionally, the mod depicts Dunkleosteus with a shark-like body as opposed to the eel-like body it is often depicted with. This makes sense. The eel-like depiction is based on a preserved impression of the related genus Coccosteus, which is not ecologically similar to Dunkleosteus and is much smaller. It makes sense for an open-water predator like Dunkleosteus to be more shark-like in form.
Fig 1. The depiction in this mod may make Dunkleosteus difficult to recognize, until it opens its mouth.
In designing an enclosure for this immense fish, what should we consider? Well, for one, this is a large, open-water species, and likely a very active swimmer. In reality, this would likely make it impossible to house for long periods in captivity. For comparison, great white sharks have proved difficult to house in captivity, as their active motion results in injury as they swim into the edges of their tank. However, other sharks, including the even-bigger whale sharks, have been successfully exhibited. With some suspension of disbelief, we move forward. Firstly, a tank built to house Dunkleosteus would need to be immense. While the tank I have built is large, in real life, it would probably need to be even bigger than this. I also incorporated another common feature of tanks built to house active fish such as sharks: rounded corners. These decrease the chance of the fish running into edges of the tank. Together, these features came together to form the basis of the shape of the tank.
Fig 2. The tank from above. Note the curved edges.
The next important piece of this exhibit is the viewing area. Like many aquariums, I chose to make the room darkened, lit from the tank itself. However, because Minecraft has a rather simple lighting engine, this was done through the use of a dark color scheme for blocks rather than through lighting itself. In vanilla Minecraft, I often use concrete and terracotta alone for this purpose, but the mod also adds black sandstone which works beautifully in this setting. The viewing gallery itself is multileveled, allowing for the accommodation of a large number of people while reducing obstruction of the exhibit. Railings separate these levels, but are made of glass such that they do not obscure the view. I also provide some stadium-style seating for people that want to sit around and watch the animals.
Fig 3. The viewing gallery. Note how the use of black concrete in the ceiling gives it an almost abyssal look, allowing it to fade from perception.
Fig 4. View from the gallery. Glass railings do not obstruct the view.
Fig. 5. View of the gallery from the water.
I hope you enjoyed reading this! Feel free to request more animals to do exhibits/posts on!!