\r\n<\/div> \r\n\r\n**Thessal the Mermaid Goddess** is the boss of the [Ocean Trench](\/wiki\/ocean-trench). The boss room has 4 air sources, that are each protected by a respawning Deep Sea Beast. If you are low hp, try to stay away from these as long as possible. Thessal will throw coral bombs that explode and split into 5 more bombs that explode to inflict more damage. This, combined with her armor breaking attacks, can make this fight a painful one. \r\n \r\n