Fusion Beast (異合; igou) is a family in the Battle Spirits trading card game.
It premiered in BS03. Almost all Fusion Beast spirits are blue. Many seem to be based on sea creatures, or have an ocean theme.
Fusion Beasts may have Rush.
- It's worth noting that many of the Fusion Beasts are based on mythical creatures made by Howard Philips Lovecraft, who was an American author who got famous with his works of horror fictions. One example of Lovecraft's creatures in BS is The MalevolentDeity Nyarla-Trap.