FOR AGES 3 YEARS TO 18 YEARS
The long spine porcupinefish (Diodon holocanthus) is a popular saltwater fish that has many common names namely balloonfish, balloon porcupinefish, and freckled porcupinefish. The strange-looking fish is often confused with the pufferfish when in actuality fishes are completely different species. Yes, just like the name of the species suggests, the long spine porcupine fish is covered in sharp spines that shoot up when threatened. But their spines tend to be thicker than a pufferfish's. The distribution and habitat of the animal are rather widespread in nature as it can get accustomed to most climates although it prefers to live in tropical and sub-tropical temperatures. A natural predator, the porcupinefish maintains a carnivorous diet and feeds on sea urchins, crabs, snails, and mollusks with their powerful teeth. To know more about this enigmatic porcupinefish keep reading.
If you want to keep learning, do check out some interesting facts and information about the salmon and the blue marlin.
The long-spine porcupinefish (Diodon holocanthus) is a species of fish.
It belongs to the Actinopterygii class of animals.
An accurate estimate of the number of mature Diodon holocanthus is currently unavailable. But the distribution of the species is rather widespread.
The balloonfish are found all over the planet and are not endemic, in all climates. It can be found along with the Pacific coast, the Florida Keys, Bahamas, Brazil, Madagascar, Mauritius, the Western Indian Ocean, and South Africa, and Hawaii in the United States. It's found all over the Caribbean and Eastern Asia. The fish is widely common in many islands and coral reefs.
Adult balloonfish can be found in the ocean's shallower sections. Grassy flats, coral reefs, and mangrove areas are their preferred marine habitats.
Quite similar to most species that belong to the family Diodontidae, the balloonfish too is a solitary animal that prefers to venture out during the night.
A popular fish in the aquarium trade, the long spine porcupine fish is hardy and easy to feed and can thus survive with minimal supervision. In captivity, their lifespan ranges from 12-15 years.
Diodon holocanthus are prolific spawners. When in the wild, the male of the species pushes the female to the top, where vast quantities of eggs are discharged and fertilized. The eggs hatch after several days of floating near the surface and the larvae are fully formed by then. When the juveniles reach 2.3-2.7 in (6-7 cm) in length, their fins and teeth mature, and they migrate to inshore habitats.
The conservation status of the long spine porcupine fish is evaluated as Least Concern by the IUCN and is not Endangered.
Often known as the balloonfish or spiny puffer, Diodon holocanthus is an average-sized fish. It has long spines that extend from all over its body, barring the fins and face and dark patches on the sides. The spines are actually modified scales that most of the time rest flat on the body but shoot up when they sense danger. The spines are rounded, slender, and erectible. The species is covered in these spines of which approximately 12-16 spines travel from its snout to its dorsal fin, anal rays have 13-14 while pectoral rays have 22-25. The body of the animal is pale brown or light olive in color with large black patches and small dark brown or black spots. The underside of the stomach in mature individuals is white but the juveniles sport dark spots. The fins are translucent and have a yellow tinge. The mouth is small and the skin around it is wrinkly.
Although the freckled porcupinefish is popular in the aquarium trade, one cannot call it cute, like yellow tang. The fish is rather strange in its appearance. Its fleshy brown body covered in spines and large eyes are what usually catches the eye.
Porcupinefish communicate in a similar fashion to other fish. They use touch, smell, sound, and impulse, among other things, to communicate with one another. Also, when the species feels threatened it inflates its body by swallowing water. This causes the body to puffer up which in turn makes its long spines shoot up dangerously. They use this technique and visual form of communication to ward off predators.
The balloon porcupinefish is quite large in size. They have a length of 12 in (30 cm) on average. They are smaller than a humphead wrasse which is 6 ft (1.8 m) in length.
Balloonfish are slow swimmers who push themselves forward with their pectoral, dorsal, and anal fins. They typically use these fins to navigate the coral reef at a leisurely speed. But when they use their caudal fins, they can achieve a rapid burst of speed. Porcupinefish are more nimble than they appear, and they can quickly change directions.
An accurate estimate of the weight of the balloon fish is unavailable. However, the peculiar fish looks rather fleshy and bulky, so one can assume that despite its small size, it probably weighs on the heavier side.
No specific name has been assigned to the male and female adult Diodon holocanthus. They are simply referred to as male long-spine porcupine fish and female long-spine porcupine fish.
Young or baby long spine porcupine fish does not have any particular name. They are referred to as juveniles.
The balloonfish maintains a carnivorous diet. It is a nocturnal animal and predator that only hunts for food during the night. The teeth of D. holocanthus are sharp and the upper and lower jaws are fused together, making a strong, heavy beak. It is thanks to its sturdy mouth structure that it is able to crack the thick shells of snails, sea urchins, and hermit crabs to feed on them. The species uses its comparatively large eyes to feed on these coastal delicacies at night. The fish also often blows into the sand or sea bed to expose small organisms, gastropods, crabs, and sea urchins. If you observe them hunting or feeding, you might get an impression that the fish is one of the most natural predators. When it comes to catching its prey, the balloonfish does not rely on speed. The dorsal fins of the predator are only useful when it comes to navigating complex environments like coral reefs and not for hunting.
Unlike most porcupine fishes, long-spine porcupine fishes are not poisonous, just like firefish. However, their external spines may hurt if it pierces the human skin.
Despite its odd appearance, the long-spine porcupine fish is quite popular in the aquarium trade. They are easy to catch and do not need too much care to thrive in a tank. They have a habit of shooting water out of aquariums so it's best to keep the tank closed with a tight lid. Also, they might inflate if they are taken out of water.
The fish has multiple common names like blotched porcupinefish, brown porcupinefish, hedgehog fish, and spiny puffer.
The species is aggressive and predatory in nature so they do not make good tankmates. They could settle down with bigger fishes like tangs or wrasses.
The scientific name of porcupine fish is Diodontidae.
When porcupine fish feels threatened it swallows or sucks water into its body. This causes the body to inflate which in turn causes the long spines to stick out at dangerous right angles. The body of the fish swells up to two to three times its original shape and takes on a spherical shape when it is inflated. Its flexible skeletal structure and elastic skin and stomach are what help the fish take on this defensive stance. It is thanks to this shielding technique that the balloonfish finds it easy to avoid predators.
Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! For more relatable content, check out these salmon facts and silverjaw minnow facts for kids.
You can even occupy yourself at home by coloring in one of our free printable Crawfish Life Cycle coloring pages.
Read The Disclaimer
At Kidadl we pride ourselves on offering families original ideas to make the most of time spent together at home or out and about, wherever you are in the world. We strive to recommend the very best things that are suggested by our community and are things we would do ourselves - our aim is to be the trusted friend to parents.
We try our very best, but cannot guarantee perfection. We will always aim to give you accurate information at the date of publication - however, information does change, so it’s important you do your own research, double-check and make the decision that is right for your family.
Kidadl provides inspiration to entertain and educate your children. We recognise that not all activities and ideas are appropriate and suitable for all children and families or in all circumstances. Our recommended activities are based on age but these are a guide. We recommend that these ideas are used as inspiration, that ideas are undertaken with appropriate adult supervision, and that each adult uses their own discretion and knowledge of their children to consider the safety and suitability.
Kidadl cannot accept liability for the execution of these ideas, and parental supervision is advised at all times, as safety is paramount. Anyone using the information provided by Kidadl does so at their own risk and we can not accept liability if things go wrong.
Kidadl is independent and to make our service free to you the reader we are supported by advertising.
We hope you love our recommendations for products and services! What we suggest is selected independently by the Kidadl team. If you purchase using the buy now button we may earn a small commission. This does not influence our choices. Please note: prices are correct and items are available at the time the article was published.
Kidadl has a number of affiliate partners that we work with including Amazon. Please note that Kidadl is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.
We also link to other websites, but are not responsible for their content.
Was this article helpful?
We’ll send you tons of inspiration to help you find a hidden gem in your local area or plan a big day out.
Check your inbox for your latest news from us. You have subscribed to:
Remember that you can always manage your preferences or unsubscribe through the link at the foot of each newsletter.