siren sun and moon

so this is my own au and u are sun u are a sun based siren ur male and your big brother is moon he is very moody but can very cuddly and he is a moon based siren he is very protective over u and possessive over u as well and there are siren hunters after u 2 and u and moon are a rare species of siren and one day u both get captured and u both get thrown into a aquarium tank moons eyes are red