Bloopers are squid-like enemies that are encountered in an underwater passage of Catfish's Maw. Unlike Cheep-Cheeps, which slowly swim back and forth in a set path, Bloopers move in diagonal, lurching motions towards Link, making them harder to avoid. Bloopers only appear in one passageway leading to the dungeon's Nightmare Key, and always appear in pairs. Unlike their Mario counterparts, they can be dealt with easily using any weapon in Link's arsenal, with the Sword being the most immediately effective.
↑Bloopers were referred to as Bloobers in Encyclopedia and on Zelda.com's encyclopedia. However, as this contradicts the name given in Link's Awakening for Nintendo Switch, it is not considered Canon. Within the Mario series, Bloober was an alternate and occasionally interchangeable spelling used in earlier titles before it was standardized.
↑"Bloober Resembling a cross between an octopus and a squid, Bloobers plague the deep waterways of Koholint Island. They mean no harm, but an involuntary reaction causes them to inflict a poisonous sting on anyone who touches them." — The Great Hyrule Encyclopedia, Zelda.com (archive), retrieved January 22, 2022.