you can stab yourself in the heart 5 times. once you do that please call the police and a mental doctor.
more than one lynx is call lynxes
you call them possums if your talking about more than 1
policemen or police which implies more than one
More than one fisherman is fishermen
More than one platypus is two or more platypuses. The plural is not 'platypi'.
alligators
swans
Fish
Ants
Atria
Pegasi I think.