Pegasi I think.
NO! pegasus is amazing therefore there is only one of him and if there were more than one, there would be just too much awesomness in this world that it wouldn't be right
yes
Pegasi... :p
more than one lynx is call lynxes
you call them possums if your talking about more than 1
More than one fisherman is fishermen
More than one platypus is two or more platypuses. The plural is not 'platypi'.
Fish
swans
Ants
its just fishermen
Polygamy.