These invertebrates belong to the Echinodermata family, including sea cucumbers, sand dollars, potato urchins, flower urchins, and starfish. In reality, over 1,000 types of sea urchins are in the ...

What do people eat and why do they eat it? A 1975 report sparks a debate about the place of sociology in human nutrition research, and a crystal-clear lecture on chemical morphology, in our weekly ...

Once 3D printing came along, people started making sea urchin hats and, sure enough, the urchins pick them up and wear them. YouTube channel SciShow shared some fun photos but also delves into how ...

How do sea urchins reproduce? Most sea urchins reproduce by females releasing eggs directly into the water. These are then fertilised by sperm. Some species’ females hold eggs in their spines to ...

For the North American river otter, fish, crayfish, frogs and turtles are on the menu, Smithsonian's National Zoo and Conservation Biology Institute reports.Meanwhile, sea otters may snack on ...

Sunflower sea stars — the giants of sea stars, with up to 21 limbs — eat sea urchins. In their absence, the sea urchin population proliferated. Sea urchins eat kelp, and the explosion in their ...

They eat so many of the dark, pincushion-like creatures that the sea otters’ teeth and bones turn purple. It’s “an-otter” example of “you are what you eat.” To our commenters ...

With its ability to grow to as big as three feet across, armed with up to 24 limbs covered with tiny suction tubes, the ...

Under the bright blue water of the Gulf of Aqaba on the Red Sea, the view is stunning. Expansive coral reefs teeming with life; colorful fish and invertebrates. But something crucial has gone ...

Longspined sea urchins are native to temperate waters around New South Wales. But as oceans heat up, their range has expanded more than 650km, through eastern Victoria and south to Tasmania.