Spiders are mobs found on most planets. They are all very similar and have the same behavior to attack the player; all Small and Huge Spiders chase the player, while all Tiny Spiders jump to attack the player. They are all known to drop Insect Legs, Spider Webs, Spider Silk, and Raw Primitive Silk.
 Tiny Spiders
Drops: Tiny spiders do not have any drops.
 Small Spider
Small Spiders can be found on planet Terra. The default spider, grey in color, and fairly weak.
 Huge Spiders
Huge Spiders are found deep underground planet Terra.
 Yellow Spiders
- Yellow Spider Necklace (Rare)
 Blue Huge Spiders
Blue Huge Spiders can be found on planet Xeno.
 Huge Red Spider
Huge Red Spiders are found on Alba.
They are located extremely deep underground, yet they are stronger than Huge Blue Spiders.
 Skull Spider
Skull Spider are found on planet Magmar.
They appear to have an inverted human skull where their head should be.
They are stronger and faster than Huge Spiders.
 Huge Jungle Spiders
Huge Jungle Spiders are found underground on Yuca.
They are as weak as spiders
 Ice Spiders
Ice spiders are found on Cryo and appear to have large ice shards sticking out of their bodies.
 Huge Emerald Spider
Huge Emerald Spiders are found on planet Lilith.
They are as weak as normal Spiders but very strong.
 Lume Spiders
Lume Spiders are found on Mykon. They are currently the first and only Spiders—other than the regular Black variant—to have 2 different sizes. Though there are 2 different sizes, their drops are identical.
- 0 - 2 Spider Web
- 0 - 3 Insect Meat
- 0 - 3 Spider Silk
- 0 - 2 Raw Primitive Silk
- 0 - 2 Insect Leg
- Lume Spider Necklace (Rare)
- Pocket Lume Spider (Rare)
- Lume Spider Mask (Rare)
While not technically spiders, these strange bulbous creatures have similar arachnid characteristics to them. There are three colors, with blue bombroaches being found on Alba, the purple ones being found on Xeno, and the green ones are found on Yuca. There appears to be no difference between them except the color.