I assume you mean a green spotted puffer, since they are the most common puffers sold at fish/pet stores.

If the fish has black spots and a green color on it’s back with a white belly, that is what he is..

check out my puffers.. I made a video of them.

They normally will not live peacefully with ANY other fish and they are very aggressive with each other at feeding times.

Puffers have a beak inside their mouth that can become overgrown if you do not feed them snails often to grind down the beak. In addition to live snails they prefer mealworms, brine shrimp.. and crabs. They will eat freeze dried foods such as blackworms etc…

It’s important that they do not overeat.. this type of fish will typically “beg” at the top of the aquarium looking hungry when it is not.. ample feeding once a day until the belly is rounded, not distended is ideal.

Also, puffers require brackish water as they mature, although most pet stores sell them as freshwater and find people asking why their fish died a few months later. They are born in freshwater in the wild and eventually migrate to brackish and sometimes to full marine (saltwater)

You can gradually increase the salinity following brackish conversion guidelines found on the internet.

I keep an angelfish with mine, only because they are juveniles and the angelfish was nipping my guppies fins in my community tank.

By blowfish, I’m assuming you mean some species of pufferfish. There are a number of species, and these range from freshwater to saltwater (with some living in brackish) conditions. Most prefer meaty foods, so things like shrimp, squid, clams, and fish (either fresh or frozen) are good. For smaller fish, bloodworms and brine shrimp can be given. If it’s one of the family Tetradontidae, they have teeth that grow throughout their lives, and they need to have hard foods (snails, shrimp with the shell on) at least on a weekly basis so they can keep the teeth worn down. If their teeth overgrow they can stop feeding and die.

If you know the species of puffer, you can find care and feeding info on them in this link:

Most puffers become territorial and aggressive as they mature, so it’s best not to mix them with other types of fish.