Spider (Yoshi's Story)
From the Super Mario Wiki
Spiders are enemies encountered in Yoshi's Story. Spiders come down on web lines and attempt to hurt a Yoshi with their spike-covered body. They cannot be defeated with Yoshi Eggs, so Yoshis must avoid them. They are only found in Stage 1-2: Surprise!! and Stage 4-1: Jungle Hut. Yoshi can't jump through their webs.