Horsea is a Water-type Pokémon introduced in Generation I.  Its has resemblance to a seahorse and is recognized by its light blue color.
 
Blue Aventurine
 
Prosperity – Heals – Inner growth 
 
Aventurine is a stone of prosperity. It reinforces leadership qualities and decisiveness. Promotes compassion and empathy.
Blue Aventurine helps those with addictions to take responsibility for their problems. When used in meditation it will assist you in overcoming addictions. Blue Aventurine clears old, stagnant energies, helping you to open up to inner growth and spiritual work. It also strengthens communication abilities, helping you to speak out when required and being true to yourself.
 
Chakra: Throat.