Aquariums mark Shark and Ray Awareness Day with a closer look at these relatives. Sharks and rays have skeletons made mainly of cartilage, and both can sense the tiny electrical signals produced by other animals.
The horn shark has one of the more unusual eggs in the ocean. Its tough egg case has spiral ridges, and a female can wedge it into a rocky crevice. Look up a horn shark egg case and see whether you’d have guessed it came from a shark.
About the observance
Aquarium to mark Shark and Ray Awareness Day on July 14 with special programming
More about the featured species
https://www.montereybayaquarium.org/animals-the-ocean/animals-a-to-z/horn-shark