I can't accept this nonsense.
Fish am the plural, however the basket is filled.Assuming it is filled with fish.

a - and thank you.
( Larry Vest One day at a time, sweet Jesus, FFS., Fri 23 Apr 2010, 9:01, 1 reply, 16 years ago)

According to online sources:
Fish or fishes
Though often used interchangeably, these words have different meanings. Fish is used either as singular noun or to describe a group of specimens from a single species. Fishes describes a group of different species.
( K2k6 has a proper job these days, Fri 23 Apr 2010, 9:10, Reply)

Hah!
According to online sources is the source of your confusion.
Obviously that is what confused King Kames too.
I stand firm on fish.
( Larry Vest One day at a time, sweet Jesus, FFS., Fri 23 Apr 2010, 9:13, Reply)

Yeah, I know
But I couldn't be arsed going over the library to look at a dictionary!
( K2k6 has a proper job these days, Fri 23 Apr 2010, 9:16, Reply)

I'll put that top of my to do list and report back.

( Larry Vest One day at a time, sweet Jesus, FFS., Fri 23 Apr 2010, 9:18, Reply)