Smeech

Smeeches, that appear in Super Mario Galaxy 2, are hard to describe, so just refer to the above picture. They float around idle and will not bother Mario unless he is on Yoshi. In this case, it will latch itself onto Yoshi's mouth and start draining his health. It also prevents Yoshi from grabbing anything with his tongue until the Smeech is Spun off, effecting it and releasing Star Bits.