What is the glow squid?
The glow squid is a passive aquatic mob that lives in dark, deep water. It looks like a regular squid with one big difference: its body and eyes glow a soft blue-green, and so do the dark waters around it. The glow is purely visual. A glow squid does not light up the area or stop hostile mobs from spawning near it.
Players added the glow squid to the game by voting for it during the 2020 mob vote. It arrived in Java Edition with the 1.17 Caves and Cliffs update, and it has been swimming around the darker parts of the ocean and underground lakes ever since.
The reason most players go looking for one is the glow ink sac it drops. That single item unlocks glowing sign text and glow item frames, both of which are useful for builds you want to read or see in the dark.
Where glow squid spawn
Glow squid spawn in water in dark areas. They need a water source block to appear in, a light level of 0, and a low enough position in the world. In most versions that means below sea level, and they show up most often deep underground or far down in the ocean.
The best places to find them are flooded caves, underground lakes, and the watery sections of lush caves. Because they need darkness, you will rarely see one near the surface during the day. If you dig down and break into a water-filled cavern, there is a good chance a small group is already glowing down there.
They spawn in groups of two to four. Like regular squid, they can despawn over time if no player is nearby, so the population in any given cave shifts as you explore.
How to find them faster
If you want a reliable spot, look for a dark underwater cave system and bring a way to see. A glow squid stands out in pitch-black water because of its glow, so you can often spot the blue shimmer before you see the mob itself. Drained ocean monuments, deep ravines that flooded, and the underwater openings of lush caves are all worth checking.
How to get glow ink sacs
You get glow ink sacs by killing glow squid. Each one drops one to three glow ink sacs and a little experience. There is no other natural source, so if you need a stack, you need to find or farm the mob.
A sword speeds up the work, and the Looting enchantment raises the maximum drop. With Looting III, a single glow squid can drop more sacs per kill, which makes a big difference when you are stocking up for a large build.
One thing to know before you start swinging: a glow squid out of water flops and takes damage on its own, the same way a regular squid does. If you push or pull them onto land with water flow, they will die without you needing to attack, and they still drop their sacs.
What glow ink sacs are used for
The glow ink sac has two main uses, and both are about making things readable or visible in low light.
Glowing sign text
Use a glow ink sac on a sign, and the text on that sign starts to glow with an outline. Glowing text is legible in the dark without any nearby light source, which is handy for labeling chests in a storage room, marking tunnels in a mine, or putting up signs that you want to read at night. After you apply the glow ink, you can still dye the text a different color, and the glow follows the dye.
To undo the effect, you apply a regular ink sac (from a normal squid) to the sign, which switches the text back to non-glowing.
Glow item frames
Combine a glow ink sac with a regular item frame on a crafting table to make a glow item frame. When you put an item inside a glow item frame, that item appears fully bright even in the dark, and the frame itself fades into the background. This is the cleaner option for display walls, map walls, and item shops where you want the contents to pop and the frame to disappear.
A glow item frame works exactly like a normal one in every other way. It holds any item, rotates with a redstone comparator reading, and can display maps stitched across a wall.
Glow squid behavior and mechanics
A glow squid has 5 hearts of health and behaves like a passive mob. It never attacks you. It drifts through the water, sinks slowly when there is nowhere to swim, and tries to stay submerged.
The glow itself reacts to damage. When you hit a glow squid, its glow fades and it stops shimmering for a few seconds before lighting back up. This is a visual cue only and has no effect on drops or behavior, but it does tell you that your last hit landed.
Out of water, a glow squid suffocates and flops just like a regular squid. It cannot survive on land, so any glow squid that gets washed onto a beach or a cave floor will slowly take damage and die. This is the basis for most simple farms, where water channels carry the squid into a dry kill chamber.
Glow squid cannot be bred. There is no food that makes two of them produce offspring, so the only way to get more is to let them spawn naturally in dark water. That makes a spawn-based farm the only real way to mass-produce glow ink.
Tips and common mistakes
The most common mistake is hunting glow squid in lit water. Once you place torches or other light sources, new glow squid stop spawning in that area, and the ones you already found may wander off or despawn. If you are building a farm, keep the spawning water dark and only light the parts where you stand.
Another mistake is confusing the glow with a light source. The blue shimmer looks bright, but it produces a light level of 0. You still need torches or other lighting to keep hostile mobs from spawning in a cave full of glow squid.
If you only need a few glow ink sacs for a sign or a couple of item frames, you do not need a farm at all. A short trip to a flooded cave with a sword is usually enough. Build a farm only when you want glow ink in bulk.
Java and Bedrock differences
The glow squid works almost identically in both editions. It is a passive water mob, it drops glow ink sacs, and the glow ink does the same two jobs on signs and item frames. The core spawning rule, water plus darkness plus a low position, holds in both.
The main thing to watch is that exact spawn ranges and rates can shift between versions and updates, so a depth that works in one world may differ slightly in another. If glow squid are not appearing where you expect, go deeper and make sure the water is fully dark before assuming something is wrong.
Frequently asked questions
Do glow squid give off light?
No. A glow squid looks like it is glowing, but it emits a light level of 0. It will not light up a cave or stop mobs from spawning, so you still need torches for that.
How do you get glow ink sacs?
Kill glow squid. Each one drops one to three glow ink sacs, and the Looting enchantment raises the maximum. There is no crafting recipe for glow ink, so the mob is the only source.
Can you breed glow squid?
No. Glow squid cannot be bred with any item. To get more, you let them spawn naturally in dark water, which is why spawn-based farms are the standard way to gather glow ink in bulk.
What is the difference between a glow item frame and a normal item frame?
A glow item frame makes the item inside appear bright even in the dark and hides the frame border. A normal item frame shows the item at the surrounding light level and keeps its visible border. You craft a glow item frame from a regular frame plus a glow ink sac.
Can you turn glowing sign text back to normal?
Yes. Apply a regular ink sac from a normal squid to the sign, and the text stops glowing. You can switch back and forth as often as you like.
Where do glow squid spawn?
They spawn in water in dark areas below sea level, most often in flooded caves, underground lakes, and the watery parts of lush caves. They need a light level of 0 to appear.
The takeaway
Glow squid are easy to overlook because they do not fight, breed, or light up a room, but the glow ink they drop is the only way to make signs you can read at night and item frames that show off their contents in the dark. Find a flooded cave, bring a sword with Looting, and a few minutes of hunting will cover most builds. Set up a dark-water spawn farm only when you want glow ink by the stack.