I thought shellfish was harvested from saltwater but recently found out some species can also be found in freshwater!
Wow, I have not seen shellfish before. How is it like?
They are invertebrates, they have so many different species as molluscs, crustaceans and echinoderms. You are missing out, they are delicious! 
That is lovely, I will like to taste some
I would love to one day see a starfish, they are so cute and there are about 1,500 different kinds! You can find them in all kind of waters, from tropical to polar!
I will also love it, in which country can I find it
They can be found in many places really depends on how deep the ocean is as they usually can be found down the abyssal depths of the ocean and also the intertidal zone.