That's just up to you, really. You can give "meat" whatever culinary definition that you wish. Fish are biologically animals, and vertebrates (like birds, snakes or mammals, which would all be classified as meat), but are quite stupid, if you're looking for an ethical answer.

Aren't there different levels of being a vegetarian? There's the type that allow fish, eggs and daily, the ones that take out fish, and the extreme ones that don't eat anything from an animal. I learned their names at some point, but now I don't remember them.

I do rememebr fish being called a 'white' meat, whatever that means. Either way, when it comes to lent, on Fridays people aren't allowed to eat red eat, so they eat white meat instead. I don't recall the story on why it is like this, but yeah, that how it goes...

You know what they call bats? Chicken of the cave

Once Upon A Time, The Catholic Church Decided That Beavers Were Fish
https://blogs.scientificamerican.com/thoughtful-animal/once-upon-a-time-the-catholic-church-decided-that-beavers-were-fish/

I think it's meat, but for instance here some religious people have days were they can't eat meat but fish is not included.

Niice, you got it.

Ovo/Lacto Vegetarian(most common) No meat, but eats eggs/milk

Lacto Vegetarian- No meat, only milk/dairy products

Vegan(me)- Doesn't consume any animal products, that includes wearing leather/fur or any other products made from animals or their by products. 

Pesco/Pollo- Only Chicken and fish

Pesco- Only fish

Ironically enough Ovo/Lacto Vegetarains are nearly as big of a contributor to animal suffering as Ominvors. Sometimes more because they generally consumer more dairy producs and eggs than Omnivors. Dairy cows and chickens are the worst treated animals in factory farms. They exploit them for their by products until they drop dead or eventually die from exhaustion. 

Thanks for the info! I gotta make sure to remember them this time :D

Its just hypocrisy in my opinion. If you are eating things for health reasons then good on you eat what you want. But if it's something stupid like killing living things then plants are just as living as animals. I feel vegetarians and vegans of that category think they are some superior being deciding which life matters more than others. IH plants aren't living like animals who cares whether they feel pain or not they don't have a nervous system or blood and blah blah blah. Now they are deeming fish to be less of a life as well. Again if its for the benefit of your own body good on you but otherwise vegans and vegetarians are in the same hypocrisy bracket as SJWs and feminazis. Screw their stupid short sighted ideology that is bases on pure hypocrisy

I think there is also the argument that "Fish don't feel pain" and that's why it is ok to eat them.