One of these things is not like the others

Produce in disguise: 10 fruits and vegetables that are not what they seem

The classification of food can be challenging because it often relies on subjective criteria. Not everyone utilizes ingredients in the same way or for the same purposes, so how we see these items is influenced by cultural and social factors.

An example of this is what produce we consider to be a fruit, a vegetable, or a nut, which doesn’t always align with its botanical classification. Let’s look at some fruits and vegetables that are not what they seem to be.

Let’s start with a classic. Most people know that tomatoes are a fruit commonly used as a vegetable (The U.S. Supreme Court once had to rule on this due to customs regulations). They have seeds surrounded by a fleshy pulp. But did you know that tomatoes are actually berries? Botanically, ‘berry’ is used for all fruit without a pit or stone where each flower develops into a single fruit.

Tomatoes are part of the Nightshade family, meaning they are related to chillies, potatoes, and the tobacco plant.

This one is for all the avocado toast lovers: Avocados are a fruit. A berry, more specifically. While in Western countries avocados are used in savoury preparations, many cultures around the world use them in desserts and sweet drinks.

But aren’t berries fruits without a stone? One would think that the stone is hard to miss in this case. Botanists are still arguing on this one, but the general consensus is that the avocado seed does not fulfill the requirements to be considered a stone. Some common plants that you might not know were related to the avocado are the bay laurel and the cinnamon tree.

A staple in the nut/dried fruit category, peanuts are neither fruits nor nuts in a botanical sense. They are actually the seed of a legume, but even then, they are unique because they are the only legume that develops underground.

Peanuts are classified and treated as nuts for culinary purposes, so people often think that a peanut allergy is the same as a nut allergy, but these are two very distinct (although dangerous) reactions. As part of the Fabaceae family, peanuts are related to soybeans, chickpeas, lentils, and peas.

Zucchinis are used as a vegetable, but they are multiseeded, fleshy, and have an edible outer layer. Rings any bells? That’s right, zucchinis are a type of berry. A member of the Cucurbitaceae family, they are relatives of cucumber, squash, watermelon, and the luffa (yes, the one used in the shower).

As an ingredient, zucchinis are usually harvested before they mature, because ripe zucchinis have tougher skin, harder seeds, and are bitter.

Also known as maize, corn is used in savoury and sweet preparations alike. Classified as a grain for culinary purposes, it is actually a grass that bears fruit. So, technically, corn is a fruit.

But where are the seeds and the skin? In the grass (Poaceae) family, each flower has a seed that fuses with the skin and forms a kernel. Other relatives that behave in the same way are wheat, rice, sugarcane, and barley.

Mushrooms are vegetables in a culinary sense, and a "fruit" body in a botanical sense, but they are neither vegetables nor fruits, because they are not plants. Culinary mushrooms are edible fungi, and as such, they have a totally different classification.

Mushrooms are not the only fungi that have culinary uses: other cases include yeast used for leavening or alcoholic beverages, fermented foods, or the mold used for blue cheese.

Rhubarb is a vegetable, but is traditionally used for tarts, jams, and other sweet desserts. The only edible part of the plant is the stalk, as the leaves can be toxic.

Edible rhubarb is a hybrid, and it’s not closely related to other edible plants, although it is a distant relative of buckwheat.

Also called capsicum or sweet pepper, bell peppers are a berry of the Nightshade family (which makes them a relative of tomatoes and potatoes). Although they are classified as berries, they lack one of their main characteristics: instead of having seeds surrounded by fleshy pulp, plants in the capsicum species are hollow.

Fun fact: plants in the capsicum species have no relation whatsoever to the pepper spice, but they were given that name because Europeans used the word ‘pepper’ for all plants and spices that were pungent.

Despite their name, strawberries are not berries in the botanical sense of the word, because they develop multiple fruits from each flower, and they don’t have seeds (even if they look like they do). Historically, the English language has used the word ‘berry’ for any small, brightly colored, and juicy edible fruit.

So, where do strawberries come from? They are a hybrid, and they belong to the Rosaceae family, which makes them a relative of apples, cherries, peaches, almonds, and roses.

From a culinary point of view, cashews are classified as nuts. But nuts, in their botanical sense, are fruits protected by a hard shell that doesn’t open on their own. Cashews are actually drupes, or stone fruits.

In this case, what we eat is the seed of the cashew fruit. As a member of the Anacardiaceae family, cashews are related to mangoes, sumac, and (by a more recent classification) to pistachios.

Names that lie

Mountain chickens are frogs? 10 animals with misleading names

Some animals have commonly been given names that might lead you to believe false things about them. For example, as we all know, guinea pigs are not pigs, sea horses are not horses, and starfish are neither stars nor fish. So, how did these names come to be? While lookalike allegations may justify some, others are simply far-fetched. Is there any truth or reason behind these inaccurate nicknames—like "firefly"? Let’s explore 10 animal names that are, arguably, misnomers.

Let’s start with one of the most far-fetched names on this list. Mountain chickens aren’t birds at all—they’re large frogs. And they don’t live in mountains, either. These frogs are found mostly in the Caribbean, inhabiting lowland rainforests and swamps. A more accurate and realistic name for them is "giant ditch frogs," which refers to their large size and their tendency to dwell near water bodies.

So, how did they get this name? The story goes that locals found the frog’s meat similar in taste and texture to chicken. Yes, this now critically endangered species was once considered a delicacy in local cuisines.

You would think that the red panda is just a smaller, red version of the giant panda. After all, they share cute faces, patches around their eyes, and similar snouts and ears. But you’d be wrong—red pandas are not bears.

Here’s the explanation: The word "panda" is believed to derive from the Nepali word ponya, which refers to animals with claws adapted for eating bamboo. This is the biggest trait red and giant pandas have in common: their heavily bamboo-based diets. Red pandas, sometimes nicknamed "firefoxes," belong to a mammal family of their own and are more closely related to skunks than to giant pandas.

Titmouses aren’t rodents—did you know? Instead, they are songbirds known for their gray or bluish-gray feathers. One of the most common species is the tufted titmouse, and you’ll be pleased to know that the plural form is, indeed, "titmice."

The name "titmouse" comes from Old English, where tit referred to a small creature, and mase was a general term for a bird. Over time, mase became obsolete, and "titmase" was transformed into "titmouse" due to the similarity between the words. Arguably, there’s also some physical resemblance between the gray color and beady, round eyes of both titmice and mice.

Yes, the name "electric eel" is misleading—but not for the reasons you might think. These aquatic animals are indeed capable of generating shocks of electricity, up to ​​860 volts, which they use to stun their prey or defend themselves. However, strictly speaking, they are not eels.

Unlike true eels, which belong to the family Anguillidae, electric eels are part of the knifefish family and are more closely related to catfish. Early European explorers misnamed them based on their elongated, eel-like bodies.

Seahorses are fish, just like salmon or clownfish. Arguably, they look nothing like those species. Instead, for centuries, humans have noticed their resemblance to horses. Seahorses have a distinctive upright swimming posture, elongated heads and necks, and a caudal fin that even resembles a horse’s mane.

Their scientific name, Hippocampus, is borrowed from the Ancient Greek word hippókampos. Interestingly, the term didn’t originally refer to this animal but to a mythological marine creature. In Greek, hippos means "horse," and kampos means "sea monster."

Guinea pigs aren’t pigs—nor are they from Guinea, the West African country. Instead, they are rodents native to South America. By now their name has become synonymous with "experiment subject" because of how frequently they were used in scientific research.

There are a couple of theories behind their misleading name. The "pig" part likely comes from the squealing noises they make, which resemble those of piglets. As for "guinea," it might derive from the British coin of the same name, implying they were sold for its equivalent value. Another theory is that European sailors, associating distant Guinea with anything exotic, mistakenly applied the name to these South American rodents.

The koala is often called a "koala bear," but it’s not a bear at all. European settlers in Australia gave it this name because its round face and fluffy ears reminded them of bear cubs.

Koalas are, in fact, marsupials. Like kangaroos, they carry their young in pouches. The word koala comes from the Dharug language (an Aboriginal language of Australia) and is believed to mean "no water," referring to the koala's ability to survive on eucalyptus leaves with minimal water intake. Did you know? Eucalyptus leaves are low in nutrients and mildly toxic. As a result, koalas have a slow metabolism and sleep up to 20 hours a day.

Fireflies don’t handle fire. They do, however, possess the ability to produce light, a phenomenon called bioluminescence. This light creates the illusion of tiny flames flying through the night. No wonder they have been associated with magic and fascination for centuries.

Despite their name, fireflies aren’t flies—they’re beetles. They produce light through a chemical reaction in their abdomens, which they use to attract mates or communicate. In fact, ​​different firefly species flash in distinct rhythms to help them identify each other.

The first time you hear the term "prairie dogs," you might picture packs of dogs roaming freely across the prairies. In reality, these animals are rodents and belong to the ground squirrel family.

The name is believed to have been given by early European settlers due to their high-pitched sounds. Prairie dogs are capable of producing sophisticated and varied calls to communicate with one another, sometimes sounding like man’s best friend. The "prairie" part of their name comes from their habitat—vast grasslands and prairies across North America. These rodents are expert burrowers and typically live in small family groups called "coteries," where members groom and protect each other.

It’s not only that ladybugs aren’t all female—they aren’t truly bugs, either. Instead, they are a type of beetle. These round and colorful insects have been widely associated with good luck and fortune for centuries. The reason for this has to do with the story behind their nickname.

The name "ladybug" originated in the Middle Ages, when farmers prayed to the Virgin Mary for help with pests in their crops. The beetles, which helped control aphid populations, were called "Our Lady's birds" or "Our Lady's beetles," later shortened to "ladybirds" or "ladybeetles." Over time, much to the frustration of entomologists, this evolved into the popular term "ladybugs."