What is Spider molting?
Emily Sparks
Published Jan 08, 2026
Molting. To grow, spiders must shed their hard-exterior exoskeleton through a process known as molting. Molting allows the spider to grow and replace its exoskeleton with a fresher model. Young spiders molt frequently, while older spiders molt less frequently.
How long does it take for a spider to molt?
Molting usually takes anywhere from 15 minutes to a full day, so keep an eye on your tarantula (remember to not touch it). You should be able to verify if it was molting by the evidence it has left behind in the form of the molt.
Does molting hurt a spider?
Molting can be quite a dangerous process for the spider. Most molts take quite a bit of time to complete. Moreover, without their protective exoskeleton, spiders are very vulnerable to attack by predators. During and immediately after they shed their old skin, their only protection is their new, soft exoskeleton.
How can you tell if a spider is molting?
Look for thinning hair or a bald spot.
Some tarantulas will lose hair on their abdomens leading up to a molt. You might notice less hair on your tarantula's abdomen or even a bald spot on your tarantula's abdomen. If you see this, then it is a good sign that your tarantula is getting ready to molt.
What do spiders do after molting?
"She essentially pops off the top of her head and pulls her body out." Shufran noted that, after molting, the spider's new skin is soft, making it more vulnerable to predation. The new exoskeleton generally hardens after about an hour or week, depending on the species.
16 related questions foundDo spiders poop?
Just like any other animal, spiders are not excluded from releasing waste. Their way of releasing their poop and urine is combined through one source - from their anus. Their poop often consists of insects and waste products since those are their primary food source.
Why do spiders get stuck in molt?
Most of the time it's just a small part of the body that is stuck, but sometimes the spider actually can become trapped inside the old carapace, which leads to a slow death. Molting problems usually are caused by a lack of sufficient hydration, or humidity.
Should I remove my tarantulas molt?
You don't have to take the molt out. Your tarantula will be fine if you leave it in – and you should if taking it out or opening the enclosure will disturb or scare your spider. Some tarantulas even like to consume their molts or cuddle with them (mine do lol).
Do house spiders shed skin?
Spiders do not grow gradually like humans but moult – they shed their hard exoskeleton, expand slightly, and then the new exoskeleton hardens. They can do this up to eight times before becoming adult; four times during their first year, then around four times the next spring.
What is a wet molt?
Wet molt. Last but not least, few spiders experience a, what is called, wet molt. As the name indicates the spider's new skin will appear wet, weak and vulnerable post-ecdysis (example 1, example2).
Can spiders regrow legs?
Leg loss is a common phenomenon in spiders, and according to the species 5% to 40% of the adults can present at least one missing leg. There is no possibility of regeneration after adult moult and the animal must manage with its missing appendages until its death.
What does it mean when a spider cocoons itself?
In most species, female spiders will spin a thick, protective cocoon for their developing eggs and sometimes the spiderlings once they've hatched. Some species will leave the cocoon unattended while the young spiders develop, and others, such as wolf spiders, will carry the cocoons around with them.
Do spiders get bigger after they molt?
primary way of studying this question was to measure spiders before and after they molted. Their abdomen expands as they gain weight (the exoskeleton is stretchy), but the size of the legs and cephalothorax are fixed, and only change when they molt.
Where do spiders molt?
To grow, spiders must shed their hard-exterior exoskeleton through a process known as molting. Molting allows the spider to grow and replace its exoskeleton with a fresher model. Young spiders molt frequently, while older spiders molt less frequently.
How long is the lifespan of a house spider?
Common house spiders, on average, live for about one year. This all depends on the species, though, as some can live to be around 7 years old. There are even some types that can live up to 30 years! Below, we explore the lifespan of a common household spider.
How long is the lifespan of a spider?
The life spans of spiders vary considerably from species to species. While many common house spiders live a few years some can survive up to seven years. Tarantulas, on the other hand, can live into their 20s. The arachnid with the longest known lifespan prior to Number 16 was a 28-year-old tarantula found in Mexico.
What does it mean if you see a black spider?
What is this? The color black symbolizes mystery, formality, elegance, and rebellion. Seeing a black spider can be a reminder to bring more mystery and discretion into your life.
Do tarantulas eat their molt?
Most tarantulas do not eat their molt. However, some tarantulas may eat their molt if they can't find adequate sustenance in their environment. Most tarantulas in captivity do not eat their molt because they have an ample supply of food and water.
Can you keep a tarantula molt?
You can place it on a shelf or store it where ever you like just be sure it's in a safe space where it won't get crushed because they are very fragile. Another further option is you can put a tiny amount of glue on the bottom of the legs and then glue it onto a board and frame it.
Do spiders sleep?
In general, many spiders, such as house spiders, will sleep during the day and hunt at night. They follow daily cycles of rest and activity, known as the circadian rhythm. This is what drives them to be awake at night and restful during the day.
Do spiders have brains?
Spider Brain
One of the most amazing things about spiders is how much they can accomplish with such a small brain. The spider's central nervous system is made up of two relatively simple ganglia, or nerve cell clusters, connected to nerves leading to the spider's various muscles and sensory systems.
What happens if you mess with a molting tarantula?
It's imperative that you do not disturb a tarantula that is molting because it may stop altogether and get stuck. Typically, they will molt flipped over on their backs as opposed to right side up.