They’re the same thing. There’s no real distinction.
Writing in 1980, L. B. Holthuis noted that the terms prawn and shrimp were used inconsistently “even within a single region”, generalising that larger species fished commercially were generally called shrimp in the United States, and prawns in other English-speaking countries, although not without exceptions.[7]
Those are prawn not shrimp
They’re the same thing. There’s no real distinction.
Source
And yet any Aussie can tell you they are shrimp.
Prawns, cunt