Chuchu

Chuchus, also known as ChuChus, are a common, recurring blob-like enemy in The Legend of Zelda: Breath of the Wild, as well as in the entire Zelda series.

In-game
There are four variants of ChuChu. There is a larger version of each variant, as well.

Blue Chuchu
The common blue ChuChu has no special powers, and simply bumps into Link to harm him. When killed, it drops Chuchu Jelly, which changes colors depending on how it died. For example, if killed with a fire weapon, it drops Red Jelly, White Jelly if killed with an icy weapon, or Yellow Jelly if killed with an Electric Weapon.

Fire Chuchu
These Chuchus are found in hot places, like the Eldin region, and specifically Death Mountain. They leave trails of fire behind them, which lights anything flammable on fire. They attack Link by making a burst of Fire, which, if touches him, leaves him temporarily on fire unless he is wearing the full Flamebreaker Set. After attacking, they lose their flames temporarily, which leaves them open for attack. They explode when killed when on fire, and drop Red Chuchu Jelly.

Ice Chuchu
This Chuchu is found in cold places, like snowy mountains. They are very light. They attack by bumping into Link, which temporarily freezes him and takes hearts. They can also omit a large icy blast, which freezes things around it (it omits the same blast when dying while frozen). After this blast, it loses its ice temporarily, leaving it open for attack. Once killed, it drops White Chuchu Jelly.

Electric Chuchu
These Chuchus are found in desert areas, such as the Gerudo Desert. If Link touches or is attacked by one, he is electrocuted, and the damage is doubled if he is holding any metal equipment (which he will automatically drop). They also frequently emit electrical blasts that can harm Link. When killed, they drop Yellow Chuchu Jelly.

Trivia

 * The way Blue Chuchus drop different colors of Jelly depending on how they were killed is similar to the way the "Game Over" screen changes colors depending on how Link died (i.e., red if from fire, blue if from drowning, yellow if from electrocution).