A way to fix this little problem is by eliminating the fish of schools that you don't want!
After casting the 'Reveal Fish School' spell, you can see that there are many fish not of the life school.
After a quick run through, eliminating all the non life fish, the pond looked a bit like this...
A few bites later...
And a Lifeacuda is mine!
Hopefully this trick helped you out on your fishing adventure and make sure to put it to good use!
Until Next Time!