It's really mind boggling to me how many people don't think fish is a meat or that they don't feel pain. Many 'vegetarians' claim they eat fish,  pescetarian is the proper term if this is the case. A fish most certainly feels pain, they have a nervous system.

The only reason most people eat fish is they claim this is the only place to get Omega 3 and 6. This is of course not the case

When most people hear fish is unhealthy they assume it's just the Mercury level but there is more than that. Just by eating fish once a week your risk of diabetes increases by 5%

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Many people think fish oil is good for the heart but everyone likes to focus on the good news not the bad to make more profit. Fish is still high in cholesterol and fat as it is an animal product.

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Mercury is still a big concern and it's not a risk you should take when there is plant based options.

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Now a major problem with eating seafood is the health of our oceans & our planet. Our ocean and our earth is in big trouble right now, people eating fish are so unaware of this. Seaspiracy is a great short film explaining this available on YouTube.

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Sources:
http://nutritionfacts.org/video/fish-and-diabetes/
http://nutritionfacts.org/video/is-fish-oil-just-snake-oil/
http://nutritionfacts.org/video/fish-oil-in-troubled-waters/