"These cephalopods have round, barrel-shaped bodies with small, round fins at the top and eight short arms and two tentacles at the bottom. Almost completely translucent in color, the glass squid can be found year-round in deep, dark areas of the ocean.
The surface of their abdominal region and fin joints are rough and covered in innumerable star-shaped protrusions. They also have 14 photophores, or light-emitting organs, located around their large eyes.
They have a fluid reserve in their abdomen that is lighter than saltwater. They can use this fluid to gain buoyancy as needed."
"A barrel-shaped squid whose rough surface is covered with star-shaped protuberances.
It has fourteen luminous spots around its large eyes, which are actually organs called photophores."
"This species keeps a special fluid, lighter than salt water, in its rounded body to aid buoyancy.
It makes up more than 60% of its body weight!"
These can be found in the Abyss under zoom-mode glow spots on the seafloor, often close to the whale skeleton in Whalebone Chasm (an area called the Graveyard in releases of Endless Ocean outside of America).
These are found all over the Zahhab Region Depths, only in zoom-mode spots. It is advised that the player bring Oceana with them while searching, as she can spot small creatures and will help the player find zoom-mode glows that may be home to small groups of glass squid.
Glass squid are usually found in groups of two or more in the second game, while they can be found alone under their zoom-mode glows in the first. They are more visibly bioluminescent in the first game than in the second (unlike their cousins, the firefly squid, which can easily be seen glowing in both games). They respond positively to being given food - the player can unlock their trivia in the second game by offering them some.
- The glass squid is the only member of its genus, Cranchia. This makes the genus monotypic.
- While this creature is simply called the "glass squid" in-game, that moniker is also used to refer to the entire family to which it belongs, Cranchiidae.
- Both the family name and genus name for this species in particular were drawn from John Cranch, an English explorer and naturalist.
- Members of the family Cranchiidae are also sometimes referred to as cranchiids, cranch squid, cockatoo squid, or bathyscaphoid squid.
- The specific species seen in-game is also sometimes referred to as the rough cranch squid.
- A squid that belongs to the same family as the glass squid, Cranchiidae, is the colossal squid, also called the Antarctic squid or giant cranch squid. This makes the 6-inch-long (15-centimeter-long) glass squid somewhat-distantly-related to the largest known invertebrate on Earth (in terms of mass; the giant squid, which is not in the same family as the glass or colossal squid, is larger when it comes to average total length, including the arms).
- While this behavior is not displayed in-game, this squid will pull its arms and head into its mantle if threatened, tucking itself into a protective ball. Another protective mechanism not seen in-game that the squid utilizes in real life is letting ink into the mantle itself, turning it from translucent to opaque; it is unknown what purpose this action serves.
- This inking behavior was thought to be unique to captive squids, assumed to be caused by confinement-induced stress, until specimens were observed in the wild displaying the same behavior.