2-minute read

Our innate capacity to feel what others feel is one of the traits that make humans human, and according to new research, it’s also what makes zebrafish—zebrafish. If the idea that our gilled friends have feelings sounds, well, fishy, you may be interested to learn that not only do some fishes have feelings, but it also seems they have feelings about other fishes’ feelings—at least when it comes to fear.

The spontaneous spread of emotions, known as social contagion, is regarded as one of the most ancient forms of empathy and has been widely recognized in humans as well as highly social mammals, including elephants, dolphins, and primates. But big-brained mammals aren’t alone in their ability to perceive and mirror the emotional states of their own kind—it’s an ability they seem to share with some species of fish.

Scientists studying the origins of how emotional states spread through social groups of animals believe that oxytocin, the hormone that regulates empathetic behaviors like trust, attachment, and bonding in mammals, enables zebrafish to sense and respond to fear in their finned comrades.

Observing two fish, one relaxed and swimming normally and one showing signs of fear, the zebrafish in the study mimicked the movements of the frightened fish and then approached and interacted with the distressed swimmer—what scientists believe could be perceived as an empathetic response. Zebrafish that lacked oxytocin were indifferent to the distress of the frightened fish and preferred the company of the relaxed fish. Some might call the cold-blooded creatures’ behavior—self-fish.

Although we may not yet know for certain if fish experience other emotions, we can imagine that a fish paralyzed by fear might feel comforted by the attentions of compassionate co-swimmers.

ICYMI Nature News

How Whale Sharks See in the Dark
Scientists studying how whale sharks can see in the darkness of the deep sea have come up with an answer—temperature-sensitive retinas. Handy! Read all about it here.

Strutting Spiders Have All the Moves
According to new research, male wolf spiders use fancy footwork and fluffy leggings to catch the eye (eyes) of lady spiders. See how they strut.

Monarchs in Serious Distress
Sad news for monarch butterflies and their habitats this week. Populations overwintering in Mexico have dropped by 22% since last year due to deforestation and climate change. Time for protection under the Endangered Species Act.

Game On for the Planet
If you’re feeling the urge to do a little planet tending and don’t have an actual patch nearby, you can get some practice in virtual ecosystem restoration with the brand-new conservation game TerraNil. Eight percent of profits will be donated to the Endangered Wildlife Trust. Check it out!

Run For the Wild Ones
If you’re local to NYC, on April 29, you can make tracks for sloths and other endangered species by participating in the Wildlife Conservation Society’s Run for the Wild. Register here.

200? 200!
A little bird told us this is Wild & Wondrous’ 200th blog. Oh. Okay then! 🥳

2-minute read

Of all the creatures under the sea, when it comes to precision prey tracking, seals (aka pinnipeds) have a distinct advantage—whisker vision. Although the mustachioed marine mammals can recognize a tasty fish when they see one, thanks to their super-sensitive whiskers, seals don’t need to see a fish to catch a fish.

Like all living beings, seals have evolved with the exact creature features and adaptations they need to thrive in their particular place on the planet. Scientists studying how seals can successfully hunt in low, or no, visibility conditions have concluded that the animals are ideally equipped to go with the flow.

Through finely tuned flow sensors in their whiskers, seals can detect the motion trail of prey from as far away as 600 feet. The whisker sensors also relay the size and direction of potential meals, indicating whether the calorie reward would be worth the energy required for a hot pursuit.

And what makes seal whiskers so exquisitely sensitive to disturbances in the water that they can even detect the exhalations of fish at the bottom of the sea? Following two decades of research, scientists have concluded that the wavy shape of a seal’s whiskers, unique in the animal kingdom, enables the specialized hunters to lock on to the frequency of preferred prey while tuning out noise from their own movement.

Besides being all-important for meal acquisition, seals’ extraordinary sensory perception and unusually shaped whiskers are now informing all manner of research into the development of biomimetic robots for underwater exploration. And you thought the innovation-inspiring marine mammals were just adorable, bristle-faced fish-eaters.

ICYMI Nature News

Green Is Good
In a much-needed boost to North Atlantic marine life, including porpoises, skates, and stingrays, 4300 miles of water along the Greater Skellig Coast have been recognized as Ireland’s first Mission Blue Hope Spot. Erin go bragh!

Free Butterfly Plants
If you participate in an urban, community, or school garden in the Northeastern U.S., the Xerces Society is now offering free native plants for your patch to help provide sustenance to endangered migrating monarchs. Find out if you qualify here.

NYC Sky Garden Opening
It’s officially spring, and NYC’s delightful, de-lovely, elevated gardens will soon burst into bloom. Starting April 1, you can tiptoe through the High Line tulips until 10 pm.

Pick Up the Pieces
From now through Earth Day, you can take part in the Great Global Cleanup to help rid our beautiful home planet of plastic pollution. Find a location near you in need of some TLC (tender loving cleanup).

Meditate on the Feather Star
If you’re suffering from mid-week Jell-O brain or just enjoy watching magical sea creatures do magical sea creature things, we highly recommend a few moments of peaceful meditation on the feather star’s multi-limbed locomotion. And go with the flow.