<span style="color: #008080">Here's something that came to me in a dream: a frog like creature with a hole on its back, which can open and close sort of like an eye, which leads to its stomach. A tentacle is always risen up to the exact middle of the hole, thereby increasing the eye-likeness. This tentacle can extend to pull prey in, and the ironic part is the monster is only vulnerable from the inside. And the whole thing is HUGE, so it would probably be a pretty viable boss monster. Yoshi!</span>