‘Walking sharks’ lay eggs without breaking a sweat

Being pregnant and giving birth is hard work for any species—but epaulette sharks (Hemiscyllium ocellatum) might disagree.
These fish and a number of other species are known as “walking sharks” for their ability to traverse both the seafloor and land with their fins. But as of now, that’s no longer the coolest thing about this rather adorable predator. Epaulette sharks’ energy use didn’t change during their reproduction cycle, as described in a study recently published in the journal Biology Open.
“Reproduction is the ultimate investment