The Gigadora is three-eyed hatch-blocking Enemy in Metroid: Samus Returns. They are purple biomasses found covering doors on the Surface and in Areas 1, 4, 5 and 7, and can only be destroyed with three simultaneous shots to its blue eyes via the Spazer Beam. In this regard, it is similar to Multi-Lock Blast Shields from the Prime Series, which were colored purple in Metroid Prime 2: Echoes. Its name and nature also suggest a relation to the Zebesian Gadora creature, an eyeball-like biomass that blocked doors leading to bosses in previous Metroid games.
"The best news is that the Spazer Beam can destroy Gigadora-covered doors. Whenever you see those purple, three-eyed creatures covering a door, fire your Spazer Beam at their eyes three times and collect whatever goodies are hidden behind them."