26 Fun Facts About Crustaceans

There are so many fun fun facts about crustaceans that make these creatures super interesting! But what are they? Read on to find out…

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Do you know crazy fun facts about crustaceans, a group of invertebrates with over 67,000 known species, who possess an incredible ability to regenerate their lost limbs? Besides, there are many fun facts about crustaceans that make these arthropods a subject of interest for animal lovers and wildlife explorers alike.

For instance, several crustaceans are amphibians, meaning they are capable of surviving in dual habits. Meanwhile, certain ones display remarkable behaviors, such as acting as zombies for other animals.

However, few words cannot fully capture the true magnificence of these elusive creatures. For that reason, we have compiled a list of 26 fun facts about crustaceans that are sure to leave you spellbound.

So without further ado, let’s get started.

1. Communicate Through Chemical Signals

While you might think of crustaceans as silent creatures, they possess a sophisticated language of their own. Rather than relying on spoken words or sounds, they communicate through intricate chemical signals.

These signals play a crucial role in various aspects of their lives, such as warning of potential dangers, seeking potential mates, and establishing territories, all achieved without even exchanging a single word. Now, you might wonder, ‘How do they understand each other without a language?’ Well, that is nature’s wonder!

2. They Are Highly-Adaptable to Change in the Environment

That’s a lesser-known fun fact about crustaceans, but they are highly adaptable to ever-changing environments. These incredible creatures have a remarkable talent for thriving in various environments. From the serene depths of the ocean to the lush landscapes of freshwater habitats, they demonstrate remarkable versatility.

Among the many ingenious survival tactics seen in crustaceans, the hermit crab stands out. This clever critter seeks shelter by utilizing empty seashells to protect its soft body. Similarly, the resourceful fiddler crab constructs complex burrows in the sandy terrain to create a safe home.

3. Lobsters Have Extraordinary Lifespan

Ever heard of a lobster’s age-defying secret, making them seemingly immortal? Well, that’s exactly the next on the list of fun facts about crustaceans. These nature creatures can live for an astonishingly long time, spanning decades, even a century.

Though humans age with each second, lobsters seem to defy time with their unique biology. The reason behind this age block is simple: they have an infinite supply of telomerase (an enzyme) throughout their body cells.

4. Most Crustaceans Can Regenerate Lost Limbs

For sure, being able to regenerate lost body parts naturally is like having a superpower. And most crustaceans can just do that! If a crab or lobster loses a limb in a scuffle, they have an incredible ability to grow it back. It’s awesome. Right?

Moving forward, this remarkable feat is all thanks to their ingenious biology. They contain stem cells with only one predefined function, and that’s to turn into anything, be it bones, limbs, or muscles.

5. They Molt Their Exoskeleton to Grow Larger

One of the most fascinating fun facts about crustaceans is their unique way of growing larger – by molting their exoskeletons. It’s a natural process where these aquatic wonders shed their old, tight-fitting shells to make way for a bigger one.

During this precious moment, they hide away, safe from predators, until their new shell forms. After successfully going through the process, they emerge with an evolved body.

6. Coconut Crab’s Claws Are Very Robust

Founded mainly on the shores of the Indian and Pacific oceans, coconut crabs are not just the average crustaceans. Instead, they have a secret weapon that sets them apart from other crabs; their incredibly robust claws! But don’t worry; they’re not out to get us; their diet mainly consists of fruits, nuts, and carrion.

Just like humans, the creature performs multiple tasks with a pair of hands, namely claws. In terms of usage, coconut crabs crack open tough coconuts to feast on the juicy inside, climb vertical portions, lift the weight, and defend themselves against predators.

7. Horseshoe Crab Has Blue Blood

Prepare to be amazed by one of the most intriguing fun facts about crustaceans, and that’s the horseshoe crab that boasts blue blood. You might wonder, ‘Why blue?’ Well, it’s all due to a molecule called hemocyanin that’s found in their bodies.

Being visually appealing, the Horseshoe Crab’s blood also plays a crucial role in the medical field. One particular demonstration includes the testing of bacterial contamination in vaccines and medical equipment.

8. Crustaceans Play Crucial Ecological Role

Do you know that these quirky creatures, crustaceans, are not just fascinating to look at but also play a vital role in maintaining our planet’s ecological balance?

As nature’s expert recyclers, crustaceans are the cleanup crew of our oceans and freshwater ecosystems. They feed on decaying plant and animal matter, keeping our waters clean and free from debris.

Besides their cleanup duties, crustaceans serve as a crucial link in the food chain. From the tiniest shrimp to the mightiest lobster, these delightful creatures become a scrumptious treat for many marine predators.

9. Non-Toxic Species Serves as a Delicious Cuisine for Humans

Enough basic fun facts about crustaceans; it’s time to discuss some tasty species in the group. Crayfish, Lobsters, and Crabs are just a couple of examples that are sure to appeal to your taste buds.

Whether steamed to perfection, expertly grilled, or served with a generous drizzle of buttery goodness, these crustaceans offer a symphony of flavors that satisfy even the most discerning palates.

10. Some Crustaceans Can Produce Light

Nature’s wonders have no bound, and the next aspect on our list of fun facts about crustaceans is based on one such wonder. To begin, a few crustaceans have the ability to produce light naturally. This phenomenon is known as bioluminescence, and it’s one of the coolest tricks nature has up its sleeve.

But why do they do it? Biologists believe that bioluminescence serves multiple purposes, from attracting mates to confusing predators and even luring prey.

11. Crustaceans Live in Diverse Habitats

One of the most overlooked fun facts about Crustaceans is they have an astonishingly diverse taste in habitats. They have the know-how to make every place their home, no matter whether it’s freshwater lakes or even damp terrestrial environments.

Take the hermit crab, for instance. This little creature has a knack for residing in empty shells. Meanwhile, the impressive coconut crab prefers the tropical vibes of palm trees. Numerous other crustacean species have successfully conquered various habitats, including deep waters, coral reefs, and land with extreme temperatures.

In the expanse of the ocean, a lively gathering takes place, and the stars of the show are none other than the spiny lobsters. Like humans, they love to hang out with each other and find safety in numbers.

Beyond safety, their social circles also play a vital role in searching for food and mates. As they explore the ocean floor, they share information about the best hiding spots for tasty treats or the most attractive potential partners.

13. Barnacles Attach Themselves to Distinct Surfaces

The next one on our list of fun facts about crustaceans is the ability of barnacles to attach to distinct surfaces. But here’s a twist – each barnacle species prefers its own chosen surface. Some of these tiny creatures fancy smooth rocks as their chosen home, while others seek refuge on shipwrecks or piers.

With a secret recipe of natural superglue, barnacles secrete a cement-like substance that hardens into a powerful bond. This allows them to hang on tight even during wild ocean waves.

14. Horseshoe Crabs Have a Total of Ten Eyes

The horseshoe crab is truly a fascinating creature, setting itself apart from other shell-wearing crustaceans with its remarkable features. One particularly impressive characteristic is its possession of not one, not two, but a whopping ten eyes. Surprised?

Horseshoe crabs have existed for millions of years, even outlasting dinosaurs’ reign. Their ten eyes are just one of the many adaptations that have allowed them to thrive for so long.

15. Fossils of Crustaceans Dates Back Million of Years

Being a sculpture of wonders, crustaceans have been as old as the caveman’s era. Astonishingly, fossils of these incredible creatures have been unearthed, revealing their existence millions of years ago.

From colossal sea scorpions to armored trilobites, these creatures once dominated the ancient seas. The work of scientists involves meticulous excavation of these remnants, leading to the unlocking of precious secrets from the depths of the past.

16. Several Species Have Been Used as Bioindicators

Among various fun facts about crustaceans, one is that they are used as bioindicators. Basically, bioindicators are environmental detectives that indicate the health of an ecosystem.

For example, the water flea, Daphnia, has been widely used in environmental studies due to its sensitivity to pollution and changes in water quality. When exposed to toxins, Daphnia displays visible responses, indicating potential hazards to the entire ecosystem.

17. A Few Crustaceans Are Renowned as Super Swimmer

When it comes to fun facts about crustaceans, the ability of these creatures to swim effortlessly just can’t be missed. Lobsters and Mantis shrimp are just a couple of examples that glide through the water faster than the blink of an eye. Despite their small size, these colorful critters catch their prey underwater at a very swift pace.

While it’s true that some species, such as lobsters, may appear to move slowly on shore, in terms of swimming, no one can beat them. Isn’t it cool?

18. The Parasitic Barnacle Sacculina Are Zombies for Crabs

Considering fascinating fun facts about crustaceans, here’s a fact that steals the attention: the parasitic barnacle Sacculina turns crabs into zombies. Feeling scary? Don’t worry; they won’t turn to humans.

Wondering how all this happens? When a tiny Sacculina larva latches onto a crab, it injects itself into the host’s body. Over time, it takes control of the crab’s behavior, like a puppeteer pulling the strings.

19. Snapping Shrimp Produces Intense Noise

Ever heard the mesmerizing sound of Snapping Shrimp? For animal lovers, it’s an enchanting experience that brings joy and amazement.

When a snapping shrimp feels threatened or wants to communicate with its buddies, it showcases an extraordinary weapon – its claw. Just to mention, this claw is not just for show; it’s a natural sound amplifier!

20. Freshwater Shrimps Clean Off Aquariums

If you’ve ever had an aquarium, you probably know the struggle of keeping it clean. Luckily, there’s a tiny helper available, and it comes in the form of freshwater shrimp.

These little creatures are not just cute, but they also act as algae cleaners. When you introduce freshwater shrimps into your aquarium, they immediately get to work, scouring every corner for algae and other debris.

21. Ghost Crabs Can Alter Their Body Colors

Can you believe crustaceans alter their body hue? That’s what we are going to discuss in our list of fun facts about crustaceans. Ghost crabs can adjust their hues to blend seamlessly with their surroundings.

This incredible ability serves multiple purposes, be it hiding from predators or sneaking up on unsuspecting prey.

22. Brine Shrimp Was the First Animal to Be Born in Space

Let’s kick off with an unbelievable fact: Brine shrimp, a crustacean, was the first animal to be born in space. Shocked? But it’s absolutely correct!

In 1991, brine shrimp eggs were taken into space to observe their development. In turn, 44 brine shrimp successfully hatched and grew in this extraterrestrial environment. This way, they become the first animal to be born in space.

23. Mantis Shrimp Has the Ability to Hit Extreme Power Punches

Since our topic is fun facts about crustaceans, it would be an injustice not to mention the power punch of Mantis Shrimp. Being visually small, the punch of this crustacean can accelerate faster than a 22-caliber bullet.

When threatened or hunting for prey, it showcases a punch. This punch is so swift and forceful that it can break glass aquarium walls and even crack open crab shells with ease.

24. Crustaceans Have Diverse Reproductive Systems

Crustaceans, as mentioned, are a group of more than 67,000 species. Despite that, distinct species possess unique reproductive systems that have been increasingly popular as a subject for research.

Some crustaceans, like the cute hermit crabs, engage in external fertilization. Meanwhile, other ones take a more hands-on approach to parenting. For example, male sea spiders carry their developing embryos on their legs until they hatch.

25. Coconut Crab is Mainly Known for its Dancing Behaviour

Among all crustaceans, there’s one dancing star that takes center stage, and that’s Coconut Crab! These intriguing creatures not only appear strong with their massive claws and impressive size, but they also have the know-how to dance like a pro.

Native to islands in the Pacific Oceans, the Coconut Crab has a unique and fun-filled way of communication. When they encounter each other, instead of engaging in typical crustacean confrontations, they start hopping off in a specific dance pattern.

26. The Largest Crustacean Spans Up to 12.5 Feet in Height

For sure, there’s no shortage of fun facts about crustaceans, and we have discussed plenty of them till the moment. Now, it’s time to discuss something big – Japanese Spider Crab.

Wondering what’s so special in this Crab? Unlike most crustaceans that are too small, this spider crab is even larger than humans, spanning up to 12.5 feet in height.

Wrapping Up Fun Facts About Crustaceans

To wrap it all up, Crustaceans are a diverse and fascinating group of marine creatures. With unique characteristics, they showcase the wonders of natural selection. Their ability to molt, adapt, and communicate showcases their unique survival strategies.

Additionally, the role of these arthropods in ecosystems as both predators and prey are crucial for maintaining balance in nature. So, if you desire to visit a beach to see such wonderful marine creatures, we highly appreciate reading the below guides: