Li'l Smooch Spider
From the Super Mario Wiki
Li'l Smooch Spiders are miniature versions of Smooch Spiders that first appear in Yoshi's Woolly World. They attack the player by crawling into them and by trying to kiss them and the player can also get hurt if the player touches them. To defeat them, the player must either throw a Yarn Ball at them, swallow them (this cannot be done with regular, larger Smooch Spiders) or simply jump on them.
Li'l Smooch Spiders only appear in the level Lair of the Smooch Spiders.
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