Re: match last element instead of first??

[naikonta]

Just as you ask, split the line. (assuming the separator is fixed).

$ perl -le '$line = shift; @fish = split /\s*fish\s*/, $line; print fo
+r @fish' 'One fish two fish red fish blue fish'
One
two
red
blue

You may compare between regex and split solutions, if you like.