Are cockroaches and lobsters related?

Are cockroaches and lobsters related? It’s a question that has puzzled both scientists and the general public. The answer might surprise you! These two animals have more in common than you’d expect, from anatomy to evolutionary history.

In this blog post, we’ll explore the fascinating connection between cockroaches and lobsters. Discover why they have so many similarities and dive into an ocean of knowledge.

Get ready to learn something new.

What is a Cockroach?

Cockroaches are small, six-legged insects that belong to the order Blattodea. They can be brown, black, or even a combination of both colors, and have two antennae. They are notorious for their ability to survive in a variety of environments, including human dwellings, sewers, and even outdoors.

Not only that, but cockroaches are omnivores, meaning they will feast on both plants and animals. This is why they are so hard to get rid of! They reproduce quickly and spread disease, making them an unwelcome pest.

On the other hand, cockroaches can also be beneficial. They aid in the breakdown of organic waste and the replenishment of nutrients in the environment.

What is a Lobster?

Lobsters are an incredible species of crustacean that are closely related to crayfish, shrimp, crabs, and other crustaceans.

They have a long body with two large claws on either side, which they use for both defense and catching prey.

Lobsters can be found in all oceans, but they mainly live in shallow coastal waters near coral reefs, estuaries, and rocky shorelines.

When fully grown, they can reach up to three feet in length and weigh up to twenty pounds! Their hard exoskeleton provides them with protection from predators as well as buoyancy in the water.

For food, lobsters catch small fish, worms, and mollusks with their claws or scavenge from the ocean floor, making them incredibly resilient creatures of the wild!

Are Cockroaches and Lobsters Related?

The answer is a resounding no! Despite their superficial similarities, these two creatures are actually not related at all. Both of them are members of the arthropod family, but they belong to different subgroups. Cockroaches are part of the Blattodea order, while lobsters belong to the Decapoda order.

The closest relative of a lobster is actually a shrimp, which also belongs to the Decapoda order. So, even though you may hear people refer to lobsters as “cockroaches of the sea,” they are in fact two completely distinct species with different behaviors and characteristics.

How are Cockroaches and Lobsters Classified?

If you’ve ever looked closely at both cockroaches and lobsters, you may have noticed that they look very different from each other. But did you know that these two animals actually have something in common? They are both classified as arthropods! This means that they both have an exoskeleton and jointed legs.

Cockroaches are classified in the order Blattodea and belong to the class Insecta, while lobsters are classified in the order Decapoda and belong to the class Crustacea. So even though these two creatures appear to be quite different from each other, they do share some similarities.

The closest relative of a lobster is a shrimp, which also belongs to the Decapoda order. This means that even though lobsters aren’t considered cockroaches of the sea, they still have some traits in common with them.

Do They Share Any Common Traits?

Though cockroaches and lobsters may seem like two completely different creatures, they actually have some surprising similarities! Both species boast an exoskeleton with a segmented body and antennae for sensing their environment.

Additionally, both cockroaches and lobsters possess compound eyes that allow them to see in multiple directions at once, jointed legs for walking, swimming, and digging, and chemoreceptors on their antennae to taste the food they eat. Finally, both animals undergo a process called molting in order to grow larger.

Do They Share any Similar Behaviors?

Cockroaches and lobsters may not look alike, but they share some remarkable similarities in their behaviors.

Both species have a tendency to hide in dark and damp places, such as under rocks or logs, in the crevices of walls or furniture, or even in sewers or drains.

Moreover, cockroaches and lobsters are both scavengers that feed on decaying matter like dead plant material, fungi, bacteria, insects, worms, and other small creatures. This is not surprising given that they can be found in both freshwater and saltwater environments where there is plenty of food available to them.

In addition to this, cockroaches and lobsters have an amazing ability to regenerate lost limbs or appendages if needed—a trait that helps them survive predators more effectively in their natural habitats.

Furthermore, both species are nocturnal animals that come out at night when it is cooler outside to hunt for food or find shelter from predators.

All these behaviors demonstrate how closely related cockroaches and lobsters really are, despite their physical differences.

What is the Closest Relative to a Lobster?

Crayfish and lobsters share many physical characteristics and behavior patterns, making them closely related.

Crayfish are smaller than lobsters and have a more delicate flavor. They inhabit freshwater wetlands, while lobsters prefer saltwater. Both species have claws for defense and foraging, as well as gills and an exoskeleton made of calcium carbonate plates that help protect them from predators.

In addition to crayfish, there are other species related to lobsters, such as shrimp and crabs.

All of these animals belong to the same taxonomic order (Decapoda), which means they share common features like ten legs (five pairs) and claws used for defense and food gathering.

However, there are some differences between these two species; shrimp have longer antennae than lobsters or crayfish do, while crabs have larger claws than either of these other two species.

Are There any Potential Benefits to Knowing if They are Related?

Ever wondered if cockroaches and lobsters are related? Well, the answer is yes! Knowing this data can provide us with some amazing benefits.

For example, by understanding the evolutionary relationship between them, we can gain insight into how these creatures have adapted to their environment over time.

Additionally, it could give us a better understanding of their behavior and how they interact with each other. This knowledge could help us better manage pests and diseases in our environment.

Finally, understanding the relationship between cockroaches and lobsters could also help us uncover more about our own evolutionary history as humans.


In conclusion, cockroaches and lobsters, although they appear very different on the surface, actually have some surprising similarities.

From anatomy to evolutionary history, these two species belong to the Arthropod family and possess an exoskeleton with a segmented body and antennae for detecting their environment. Plus, their compound eyes enable them to see in multiple directions at once.

Similarly, they both hide in dim and damp locations and search for food. However, it’s important to note that the closest cousin of a lobster is not a cockroach but rather a crayfish, also belonging to the Decapoda order.

Knowing this data can help us understand our own evolutionary history as humans, as well as how these animals interact with each other.