I have caught and eaten my own fish, which is the same day I also stopped catching and eating fish to any degree. Seeing a fish struggling in a net, or bleeding with a hook through its mouth is the same as seeing a hen crammed in a cage or a cow hung upside down to bleed out. One of the Buddhist Sutras also explains:
"A disciple of the Buddha shall not himself kill, encourage others to kill, kill by expedient means, praise killing, rejoice at witnessing killing, or kill through incantation or deviant mantras. He must not create the causes, conditions, methods, or karma of killing, and shall not intentionally kill any living creature.
"As a Buddha's disciple, he ought to nurture a mind of compassion and filial piety, always devising expedient means to rescue and protect all beings. If instead, he fails to restrain himself and kills sentient beings without mercy, he commits a major offense."
I consider fish as sentient as the next species. Now, petri dish meat, on the other hand...?