Can You get sick by eating half cooked fish?

i went out to eat lunch today at a restaurant with my parents,we always go there,really good food. so my dad and i ordered the mahi mahi (fish). when i took a bite out of it,it wasn't like usual. it was really gummy like. so my dad tried his and it was the same like mines. So my dad told me that it was probably frozen,so the outside got cooked,and the inside didn't get fully cooked. it wasn't pink or anything,it was white like normal just a gummy like texture. and my stomach is ok right now. i ate it about 1 pm and its now 9 pm where i live. so will i get food poisoning?