A retired teacher found some seahorses off Long Beach. Then he built a secret world for them

Rog Hanson created a secret habitat for seahorses in the coastal waters off Long Beach. He's come to see them about 1,000 times.
Read more: https://www.latimes.com/science/la-sci-col1-seahorse-pacific-california-20190709-htmlstory.html?source=Snapzu