I went to the fish store to look for cardinal tetras and saw a pea puffer and two bumble bee gobys (so peaceful and calm...). The fish guy was telling me that these 2 fish are freshwater and I was surprised...he never mentioned anything about how these fish need brackish water which is what I've read so far online. What's the deal with that? Can they live in freshwater? Also, any advice or tips about those pea puffers? PRETTY SWEET fish! I read briefly about them on here. Any real-life experience with these little guys?