Everything in that game is Italian when you think about it, lol.
"Dolphin" Plaza, "White" Hills, "Serene" Beach, "Rich" Harbor... and the piantas are just "Plants". I wonder how the game was translated abroad, now that I think about it...
There's several others too, including my favorite "Noki Bay" (Shell Bay)
If you have ever played "Super Mario Sunshine" you have played on a island called "delfino". Well, it turns out that from a top view, the island looks EXACTLY like a dolphin! Just a nice little easter egg! :)
There is a great stand-up panini place in Rome on the Corso Vittorio Emanuele called "Il Delfino." Also great calzone.
It's ridiculous how many times I had to repeat "il delfino" to work out what it meant...