The plural form of "rhinoceros" (kirafu/virafu) can be both "rhinoceros" or "rhinoceroses".
The false Latin plural form "rhinoceri" is not correct.
It was "rhinocerotes" in acient times.
Another note: white rhinos eat grass, black rhinos eat leaves, but are almost extinct in most places.
I was thinking "rhinoceroi" first because of the Greek "rhino-", but it turns out κερας is neuter. I'll just go back to calling it "the other unicorn". :-)
I got the answer! For living things irrespective of class, the prefixes for M/WA class are used!
Because animate beings take on the prefixes and agreement of class1/2 nouns