Ark of the Month is the seventh stage in Castle of Fish.
BattlegroundThe battle starts with a metal hippoe and pigge. After 15 seconds or so a second metal hippoe and pigge spawns, after this another 15 seconds and sir seal spawns in intervals of 10 seconds. metal hippoe will stop spawning but not pigge
An easy way to beat this stage, is to simply spam Giraffe Cat as they attack fast enough to dispose of all of the enemies.