How did skates and rays develop their unique wing-like fins? Researchers from the University of Chicago recently revealed the animals altered their body structure to live on the ocean floor, and to do so they relied on repurposed genes.
More than 17,000 marine species, including whales, sharks, rays and fish, remain threatened due to a lack of marine protected areas.
A recent day on the Internet had the hashtag Flatshark. There are more than 500 rays and skates -- the "flatsharks" in question, all related to sharks. As public opinion turns in favor of sharks, scientists would like to see rays get attention, too.
Despite their long, long time on Earth, sharks and ray-finned fishes are losing in the competition of species proliferation. An evolutionary biologist has findings regarding land vs. water, and predictions for other biodiversity patterns.
For three years beginning in August, 400 underwater video locations all over the globe will record valuable information on sharks, rays and skates and their relationship to reefs.