Trout or Trouts is plural for trout.
Trout
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'.
Yes, the noun trout is an uncountable noun; one trout, two trout, a basket of trout. However, the plural noun 'trouts' is accepted as a word for two or more individual trout, but the food substance is always an uncountable noun.
Fish
swans
Ants
Yes, the noun 'trout' is both singular and plural (one trout, two trout). The plural noun 'trouts' is accepted as a word for two or more individual trout, but the food substance is always an uncountable noun.
Pegasi I think.
Vampiresses.