Qurbaani & Halaal Slaughter

Catching and releasing when fishing

Q: I went fishing recently and before catching any fish I did not have a clear intention whether I would catch and release the fish or eat it. When I had the fish already hooked on the line I was told that we should eat it by 1 person so I pulled it out and thought we were going to eat it. But then another person more knowledgeable told me to release it back into the ocean because the fish was a bottom feeder and would not be nice to eat. I then released the fish back into the ocean after it had already been hurt by the hook. I did not know that it is not good to catch and release before fishing. Did I commit a sin by catching and releasing that fish?

Sacrificing on the name of anyone besides Allah Ta'ala

Q: 

1. Is sacrificing meat for anyone other than Allah considered an act of shirk (associating partners with Allah), or is it regarded as a bid’ah (innovation) that does not amount to shirk? 

2. If it is indeed shirk, then what is the ruling if a Muslim sacrifices meat for a highly revered figure in Islam such as the Prophet Muhammad (peace and blessing of Allah be upon him), Prophet Isa (Jesus, peace be upon him), or Ali (may Allah be pleased with him); or alternatively, if the sacrifice is made for a sacred Islamic site like the Ka'bah or Masjid al-Aqsa? Would such an act nullify the person's faith (iman)?

6 shareholders distributing the 7th share of the qurbaani animal that was done for Nabi (sallallahu alaihi wasallam) equally

Q: If 6 shareholders put money together to make qurbani on behalf of Nabi صلى الله عليه وسلم with the 7th share of an animal, how will the meat of the 7th share be divided? Does it have to be shared equally between the 6 people same as the other 6 shares?