What are all the uncommon sources of proteins?

things such as aphanizomenon flos-aquae, spirulina, dried breadfruit, drinks, nuts or grains that we usually don't eat. I've read an article that we could ground dried breadfruit into flour and use it as a good food source. I'm interested in alternative sources of proteins, things that we usually don't eat. I'm already eating pine nuts. is there any protein in coconut? I've read another article that coconut's saturated fat isn't bad for us cause it's digested different.