This is the much-needed information about how slimes reproduce, how slime genetics are inherited, when a slime grows up, and how old slimes live.


How To Tell If A Slime Is Male Or Female

Slimes are a dimorphic genus, meaning they have visible physical differences between males and females. Here is a chart of which is which:

Species Male Female
Pink Dark Magenta Dark Pink
Phosphor Glowing Antennae Plain Antennae
Rock Rocky "Legs" Normal "Legs"
Crystal Crystalline Spurs No Spurs
Rad Plain Head, Smaller Aura Glowing Spike On Head, Larger Aura
Boom Energy In Cracks Energy In Patches
Honey Three Honeycomb Six Honeycomb
Tabby Subtle Stripes Bold Stripes
Hunter Smooth Body, Plain Ears Spikes On Side of Band, "Lynx Ears"
Quantum White Eyes Black Eyes
Puddle Tiny Ears No Ears
Fire Tiny Ears No Ears
Tangle No Green Center Of Flower Green Center Of Flower
Mosaic Normal Coloring Turquoise
Dervish Thin Stripe Absent Thin Stripe Present


A slime begins to seek a mate when it is a teenager, but it does not actually do anything until the slime is grown up. Slimes mate for life, and do not seek replacements if one mate dies. Slimes cannot mate with siblings or parents. When two slimes mate, slimes act similarly to Minecraft animals. Both small slimes and largos can become pregnant, and they can mate with each other, too. However, two slimes have to be the same species or at least share one species if largo. All slimes will have behavior when initially attracting each other, and there are cues for attraction and rejection. After a slime reproduces successfully, it will not reproduce again.

Signal Meaning
Blushing, Happy Face Attraction
No Reaction Rejection
Ears Twitching Attraction
Ears Not Twitching Rejection
Invisible For A Prolonged Time Rejection
Booping Attraction
Periodically Flashing Glow Attraction
Glow Turned Off Rejection
Rolling And Hopping Attraction
Exploding On Purpose Attraction
Riding On Twister Attraction
Creating Glints Attraction


When a slime mates, the female is pregnant. During stage one, nothing is visible, however the female will need to eat twice as much. If you begin to suspect that someone is pregnant, be careful to be extra attentive to their needs, for this reason. If you have corrals, then it is a good idea to give the couple their own corral. After a week of that, the female will double in size, and will not produce plorts. They will seek a location for their nest, and they will then create a nest by hopping a lot to leave a ton of slime there, this slime does not go away for a long time. After a week, the female will enter the nest and sit there, and then proceed to grow overnight, so fat that they cannot move. Their thirst will not decrease. They are like a gordo but smaller, and the mate now extensively cares for the female by feeding them and protecting them. Other slimes will notice and leave gifts as well.


After the third week, females will give birth to baby slimes. The mate will stay close by. It works like a gordo bursting, but separating into the female and the babies. If this happens on your ranch, then one slime who witnessed it will arrive, looking happy.


Unfortunately, there is the rare chance that a female will have problems with either pregnancy or having babies. Some problems are an event, while others remain with the slime for life. To prevent complications with genetic disorders, screen the parents to make sure that they are healthy. If something happens, then a witness will come to you, looking concerned.

Division Failure

This happens when a mother fails to divide, resulting in pain and sometimes death. You can tell that there is a complication if the mother has a face of pain and remain in a dividing position, and they get a fever and blush. You need to act fast or else both the mother and the babies will die, feed them as you would a gordo and they will burst like one. Even then, there is a 50% chance that the mother will combust and die when that happens, and boom slimes have a 75% chance due to the fact that they are likely to explode when they burst -a normal division does not involve exploding. However, the babies will survive the ordeal, and even if the mother dies, the father will continue to care for the babies.


Sometimes, a baby dies when the mother is pregnant during stage one or two. One or two miscarriages is normal, but if most or all of the babies die, then you have a more serious problem. Even if there are more than two, you should still have at least half of the litter left, as this is normal for older slimes as they grow closer to old age.

Chronic Miscarriage Syndrome

This is a genetic disorder where the mother cannot reproduce because most or all of her babies die during pregnancy.

Sudden Infant Death Syndrome

This is an event where the most or all of the babies die for no apparent reason. There is nothing you can do about it, but it shouldn't happen again.

Illness, Deprivation, and Injury

If the mother is starved, dehydrated, infected, or injured in certain ways, then a lot of the babies will die if the mother survives. In addition, surviving these things gives the mother a 25% chance of division failure because the body has to work harder.

How Slime Genetics Are Inherited

Slimes who mate produce babies based on the parents' species. If both parents are small, then all the babies are the same species. If one or both parents are largos, then the babies are the species that the two slimes share. If both parents are largos that share both species, then the babies are two different species -they aren't largos, rather, there are both species present in the litter.


This section is about baby slimes and offspring. Here is a chart on the physical effects on different species:

Species Baby Young Slime
Tabby Plain white, folded ears White with stripes
Hunter Plain green, folded ears, no spikes Patches of adult coloring, small spikes
Phosphor Doesn't glow, tiny wings Faint glowing, small wings, still can't fly
Rock Tiny rocks Rocks not full grown yet
Crystal Doesn't produce crystals, tiny crystals Crystals not full grown, still no crystals produced
Boom No energy produced, doesn't explode Takes a long time to explode, smaller explosions
Rad No aura, doesn't glow Weak aura
Dervish Tiny ring stub, doesn't spin Can only produce small twisters, larger ring
Tangle Bud on head, can't use vines A flower that appears closed

Newborn Slimes

In the day that slimes are born, they have a large, clear membrane that they are surrounded in, and it prevents them from losing water and is their initial food source. The mother will not leave the nest, and the father will assist in caring for the babies. If the mother is dead, then the father takes over nest duty and another slime brings food to the parent. Newborn slimes are blind and deaf, and they cannot move much.

Baby Slimes

For the rest of the week, slimes are babies. They can move, but not very far. They still have a clear membrane, but only for preventing water loss, as they have to eat food now. The parents protect and feed the babies. The babies still stay near the nest, as they are not mobile enough to use slime holes, so the parents don't either in order to protect the babies. Babies can see and hear, but their senses are not fully developed yet. The babies learn mobility gradually on their own: days two and three are just moving, days four and five are hopping, and days six and seven are advanced mobility. At this age, active abilities are absent, and slimes generally start making their first sounds at day four.

Young Slimes

When a slime is a week old, they have developed substantially. They have adult mobility with the exception of phosphor slimes, who can't fly but are otherwise fully mobile. If one parent is dead, then surrogate assistants leave, because the slimes are old enough to not need contant supervision. Slimes will play and interact with each other, and they can now use abilities, but hunter slimes are only invisible in the parts with adult coloring. They can feed and water themselves, too, and they are mobile enough to enter slime holes. However, these slimes are still not old enough to defend themselves reliably or handle emergencies, which is why they still need a parent to teach them how to do these things. The nest dries up.

Teenage Slimes

When a slime is three weeks old, they are a teenager. They can leave their parents, but they are still not adults, they do not reproduce or have any serious adult responsibilities yet, and they are physically incapable of becoming a largo. However, it is apparent as to what a slime is thinking about becoming. (Will add a chart when I complete the Slime Biology Page.) This is because they will start training for it. When a slime is a month old, they become adults.


Adult slimes have responsibilites and have decided on becoming a largo (or not). Adult slimes become at three years old. Slimes are biologically immortal, but their population is kept in check by all the predators, natural disasters, illnesses, and other environmental factors that they face.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.