Inspired by Zootopia and Beaststars. But everyone is basically a hybrid of human and animal.
Natsu - Lion: Wildness, leadership, assertiveness, determination. (I know technically he's more associated with dragons but for this I'm using animals that are real.)
Lucy - Deer: Grace, sensitivity, intuitiveness, vigilance.
Gray - Wolf: Sharp intelligence, courage, loyalty, freedom.
Erza - Fox: Cunning, strong responsiveness, speed, agility.
Juvia - Sheep: Innocence, gentleness, self-acceptance, respectful.
Gajeel - Bear: Strength, confidence, solitude, taking action.
Wendy - Butterfly: Healing, timidity, elegance, sweetness.
Mirajane - Peacock: Beauty, balance, spirituality, awareness.
Elfman - Turtle: Grounded, emotional strength, persistence, understanding.
Lisanna - Hummingbird: Playfulness, lightness, swiftness, resiliency
Levy - Owl: Wisdom, change, forgiveness, observant
Cana - Cougar: Quick, dependable, self expression, enigma
Jellal - Rabbit: Cleverness, creativity, patience, abundance.
Laxus - Hawk: Power, pride, endurance, vision.
Freed - Raccoon: Curiosity, resourcefulness, adaptability.
Bickslow - Frog: Renewal, quick thinking, connection.
Evergreen - Dragonfly: Joy, perception, intuition, brightness.
In this world they all attend boarding schools and they have to follow two rules: Number one predators can't eat meat (except for eggs and fish, in this fish haven't evolved neither have archnids or parasites or invertebrates) number two predators and prey can't get involved romantically. Also aside from being half animal the main characters will also be typical high school stereotypes.
Natsu - Jock
Lucy - Radicalist
Gray - Bad Boy
Erza - Punk Chick
Juvia - Shy Girl
Gajeel - Rockstar Rebel
Wendy - New Kid
Mirajane - Popular Girl (The kind one)
Elfman - Wrestling champ (With a sensitive side)
Lisanna - Cheerleader
Levy - Journalist
Cana - Goth
Jellal - Nerd
Laxus - Jerk Jock
Bickslow - Track Star
Freed - Chess Club
You get the idea.