My guest on this week's podcast is Danny Badger, fisheries scientist, educator and jellyfish nerd, who's worked at the New England Aquarium in Boston, USA and the National Network for Ocean and Climate Change Interpretation (NNOCCI).

We discuss everything (almost)!

• from the size of sea-lions to dead zones
• talking to angry people
• protecting the blue planet
• maximising your chances on a first date by visiting an aquarium
• and how sushi restaurants use jellyfish to hypnotise their customers.