Hot Lips

Hot Lips are lava-dwelling creatures that first appear in Super Mario World 2: Yoshi's Island and Yoshi's Island: Super Mario Advance 3. They later appear in both Yoshi's Island DS and Yoshi's New Island. Hot Lips have a similar appearance to Gargantua Blarggs but are much smaller and completely stationary.

Super Mario World 2: Yoshi's Island / Yoshi's Island: Super Mario Advance 3
Hot Lips live completely inside lava, being permanently stationed in one place. To attack, Hot Lips peek out of their basin and spit a stream of lava in the direction of Yoshi and Baby Mario, in a manner similar to that of the Spray Fish. If the Yoshi is hit with the lava stream, he instantly loses a life. Hot Lips can only be defeated with a POW Block, as many other attacks are completely ineffective and eggs only temporarily stun them.

Yoshi's Island DS
Hot Lips later appear in Yoshi's Island DS. They still attack by spraying lava at Yoshi, and if Yoshi touches the spray, he loses a life. They appear in levels such as Yikes! Boiling Hot!, Six-Face Sal's Fort, and Find the Number Ball!.

Yoshi's New Island
Hot Lips reappear in Yoshi's New Island in the level Gargantua Blargg Attacks! Their lava streams no longer defeat Yoshi on the spot. Instead, they cause him to drop Baby Mario as most other enemy attacks.

Super Mario World 2: Yoshi's Island

 *  Official Nintendo Player's Guide: Always on the lookout for a good time, Hot Lips likes to squirt lava on everyone who passes by.
 * Shogakukan guide:「溶岩を吐き出すテッポウオ. 夕マゴを当てれば、しばらくおとなしくなる. 」 ("A Spray Fish that spits out lava. If you hit it with an egg, it will be quiet for a while.")