Molting Emergencies

Recognizing Problems During One of the Most Vulnerable Times in a Spider's Life

Molting is one of the most important—and most dangerous—events in a jumping spider's life.

Every jumping spider must periodically shed its old exoskeleton in order to grow. While most molts occur successfully without intervention, the process is physically demanding and leaves the spider temporarily vulnerable.

For new keepers, it can be difficult to distinguish between normal molting behavior and a true emergency.

The good news is that most unusual molting behaviors are completely normal.

The bad news is that genuine molting complications can become serious very quickly.

Understanding the difference can help you respond appropriately while avoiding unnecessary interference.

First: Most Molts Go Smoothly

Before discussing emergencies, it's important to remember:

Most Molts Are Successful

Jumping spiders have been molting successfully for millions of years without human assistance.

The majority of spiders:

  • Enter premolt

  • Build a retreat

  • Molt successfully

  • Recover normally

Many situations that appear alarming are actually part of the natural process.

What Is a Molting Emergency?

A molting emergency occurs when a spider is unable to successfully complete the shedding process.

Potential complications include:

  • Incomplete molts

  • Stuck limbs

  • Entrapped abdomen

  • Entrapped pedipalps

  • Entrapped fangs

  • Physical injury during molting

These situations are uncommon but can be serious.

Normal Molting Behavior

Many keepers mistake normal behavior for an emergency.

During a healthy molt, a spider may:

  • Hang upside down

  • Remain motionless

  • Refuse food

  • Hide for extended periods

  • Appear unresponsive

All of these behaviors can be completely normal.

Never Disturb an Active Molt

One of the most important rules in jumping spider husbandry is:

Never Interfere During an Active Molt

Do not:

  • Touch the spider

  • Open the hammock

  • Attempt to assist

  • Spray directly onto the spider

  • Move the enclosure unnecessarily

Even well-intentioned intervention can cause severe injury.

What Is a Bad Molt?

A bad molt occurs when the spider cannot completely free itself from the old exoskeleton.

Common examples include:

Stuck Legs

One or more legs remain trapped.

Stuck Pedipalps

The mouthpart appendages fail to emerge properly.

Stuck Abdomen

The old exoskeleton remains attached to portions of the body.

Stuck Fangs

The chelicerae fail to fully separate from the molt.

These complications can range from minor to life-threatening.

Signs Something May Be Wrong

Potential warning signs include:

  • Visible trapped limbs

  • Obvious exoskeleton attachment

  • Extended struggle

  • Inability to free body parts

  • Deformities immediately after molting

Observation is important, but patience remains critical.

Timing Matters

Many spiders appear awkward immediately after a molt.

Freshly molted spiders often:

  • Move slowly

  • Remain inactive

  • Appear weak

  • Avoid climbing

This alone is not an emergency.

The spider needs time to:

  • Harden its exoskeleton

  • Strengthen its muscles

  • Recover from the process

Humidity and Molting

Proper hydration supports healthy molts.

During premolt, ensure:

  • Adequate ventilation

  • Access to water droplets

  • Appropriate enclosure humidity

However:

Do Not Flood the Enclosure

Excess moisture can create additional husbandry problems.

Balance is important.

My Spider Is Hanging Upside Down

This is one of the most common concerns among new keepers.

In many cases:

This Is Completely Normal

Many jumping spiders molt while suspended within their hammock.

A spider hanging upside down is not automatically in distress.

My Spider Hasn't Moved for Hours

Molting can take time.

Depending on the individual spider:

  • Preparation may take hours

  • Recovery may take days

Motionlessness alone is not necessarily a problem.

Missing a Leg During Molt

Occasionally, a spider may lose a limb during a difficult molt.

While unfortunate, younger spiders can often regenerate missing legs during future molts.

The extent of recovery depends on:

  • Age

  • Severity

  • Number of molts remaining

Deformed Legs After Molting

Freshly molted legs sometimes appear:

  • Curled

  • Bent

  • Misshapen

Minor abnormalities occasionally improve as the exoskeleton hardens.

More significant deformities may remain permanent.

Stuck Exoskeleton Fragments

Small pieces of old exoskeleton occasionally remain attached.

Examples include:

  • Tiny leg fragments

  • Small abdominal pieces

  • Minor exuvia remnants

Not every retained fragment requires intervention.

The spider's overall condition remains the most important factor.

Postmolt Recovery

After a successful molt:

Leave the Spider Alone

Allow recovery time.

Do Not Feed Immediately

Wait until:

  • The spider becomes active

  • The fangs darken

  • Normal movement returns

Maintain Hydration

Provide drinking opportunities without disturbing the spider.

When a Situation May Be Critical

Serious concerns include:

  • Large sections of exoskeleton remaining attached

  • Complete inability to move

  • Major body parts trapped

  • Severe deformities

  • Obvious physical injury

These situations may significantly impact survival.

Prevention Is Better Than Intervention

Most molting complications are best addressed before they occur.

Focus on:

  • Proper hydration

  • Good ventilation

  • Stable husbandry

  • Reduced stress

  • Appropriate temperatures

Healthy husbandry greatly improves the likelihood of successful molts.

Common Beginner Mistakes

Opening the Hammock

One of the most damaging actions a keeper can take.

Feeding During Molt

Molting spiders should not be offered prey.

Spraying Directly on the Spider

Can increase stress and create additional risks.

Assuming Every Molt Is an Emergency

Most unusual-looking molting behavior is completely normal.

Intervening Too Quickly

Patience often prevents unnecessary harm.

When To Seek Experienced Advice

Consider consulting experienced keepers if:

  • Limbs remain trapped after molting

  • Large exoskeleton sections remain attached

  • Severe deformities are present

  • Recovery appears abnormal

Photographs can often help experienced keepers evaluate the situation.

The Tiny Coven Approach

At Tiny Coven Jumpers, our philosophy regarding molts is simple:

Observe more. Intervene less.

Most successful molts occur when the spider is allowed to complete the process without interference.

While emergencies can happen, they are far less common than worried keepers often imagine.

Patience, stable husbandry, and careful observation remain the most valuable tools during any molt.

A Keeper's Rule of Thumb

A spider in molt needs privacy more than assistance.

Provide proper conditions.

Maintain hydration.

Avoid disturbance.

And trust the process whenever possible.

In most cases, the greatest help a keeper can provide during a molt is simply allowing nature to do what it has done for millions of years.