This week's featured species looks like it was ripped out of the sci-fi classic Aliens! Meet the Viper Dogfish!
An incredible find at the bottom of the Caribbean: a baby catshark developing inside a transparent egg case.
Catshark or Dogfish? This week's Featured Species goes by both! Find out more about this deep water shark with a glowing talent.
Ever heard of a shark that puffs up like a balloon to defend itself? If you're a Swellshark, it's all in a days work!