  i'm very disappointed in all of u. i wrote a question and only one person bothered to answer. here's her answer: according to my brother who is currently facinated with the english language(did you know that to be facinate is the root for being put under and evil spell) it can be platapi or platapuses though he says: The plural of platypus?
Actually, there are two! Both 'platypuses' and 'platypi' are said to be correct in the English language! What do you think of that? I'm not sure why 'platypi' is correct, however, as that suggests that the word 'playpus' is of Latin word. (Latin words that end in -us have a plural form ending in -i, such as 'fungus : fungi' or 'octopus : octopi'. ) The name 'platypus', however, comes from Greek words. The Greek words platus (flat) and pous (foot) were combined to form the word platupous (flat-footed). thank u linz (and brother glenn) 
