From Nookipedia, the Animal Crossing wiki
The firefly squid is a sea creature in Animal Crossing: New Horizons.
In New Horizons
|Time of year||North: Mar – Jun|
South: Sep – Dec
|Time of day||9 PM – 4 AM|
|Spawn requirement||Appears from the start of the game|
|Selling price||1,400 Bells|
Donating to the museum
Blathers will say the following when given a firefly squid:
"The firefly squid is a wee migratory squid that barely reaches three inches in length. And though they usually live in deep water, they do venture to the coast to spawn. Like their firefly namesakes, these sparkling squid emit a blue bioluminescent glow. This glow may be used to threaten enemies, communicate with friends, or, perhaps, to lure food in. Truth be told, we do not know for sure why the firefly squid glows. We remain in the dark, as they say."
Once donated to the museum, the firefly squid is displayed in the deep sea area of the fish exhibit alongside the spider crab.
Names in other languages