Hi Ketua,
There is no way to tell who contributed to a guild achievement. There is also no way to tell for sure when you’re fishing in a pool. You could guess by watching the tooltip to see if you moused over a pool right before the loot window opened with fishing loot, but it wouldn’t be perfect.
Also, if your guild doesn’t believe you when
you say you caught 7.5k fish in a week, they probably wouldn’t believe you any more if you say
your addon says you caught 7.5k fish in a week.