Welcome to the forum!
Pea puffers are one of the (surprisingly numerous) fully freshwater pufferfish. Those that try to argue otherwise are misinformed.
Based on the look and size of the clowns, I’d say your tank looks about the size of a 50 gallon corner?
In that size tank I’d go with a green spot puffer (freshwater when young but needs to be acclimated to full marine/high brackish when an adult) or a valentini/Toby puffer. Both may snack on corals or inverts. One important thing for puffers is that they like near pristine water and can be sensitive to bad conditions unlike hardier fish like cichlids or damsels (like clowns). One of the few exceptions is C. Asselus (Amazon puffer) which is freshwater and actually quite tolerant of varying conditions, but still needs very clean water.
In that size tank you could also look at filefish. They aren’t true puffers but are a close cousin and have similar behaviors/looks.
