All of this is my opinion, and how I would (re)design them. If you like it, great, I am glad, and perhaps I'll write more if my ideas are well received. If not ah well, you'll have an idea of what not to do.
Biology:
On the point of females, I never understood why they would have breasts. Reptilian species, (as I imagine Predators, everyone is entitled to their interpretation) do not breast feed, so I imagine females without them.
I have read that they would be horned, larger, and more aggressive than males. Although the size and aggression makes sense evolutionarily, (i.e. bears, lions, spiders, manti) the concept undermines the power of the males to me, so I, and this is just me, imagine them smaller than males, in equal ratios to humans of the same race on average.
To continue on the reptilian matter, I would write them to be capable of switching between endo, or exothermic. Exothermic when in warm conditions, thus not needing to eat so often, and endothermic when cold, requiring more food.
Perhaps their camouflage is also partially a organic trait, like the octopus, or chameleon, but their technology enhances it.
The eyes I imaged to be vertical, like a lizard's, even though they are not it the films I believe.
I imaged two thumbs, one on each side of the palm, and their fingers/ toes would have one more digit than humans. Better for climbing.
Hide made of scales, and tough like a croc's.
Sharp claws, teeth and tusks, all made of fast growing ivory.
More ribs than humans, and two of all vital organs, except brain.
Their bodies would also adapt very quickly to changes. Their bodies begin storing fat, reinforcing bones, and building muscle within hours of changes in environment or new patterns.
Still no full opinion on the dreads....other than they're awesome.
Carnivores.
Culture:
I believe females would be prized, and in need of impressing (one of the reasons the males hunt), and capable fighters, preforming the duties females would in hunter/gather societies. So while males hunt, waged war, defended, and governed, made tools and weapons, females would be the backbone of society, cooking, artistry, smithing, child rearing, and operating ship mechanics.
Not to say their would not be capable female warriors as well. Think, Klingons.
It would be dishonorable to not be able to defend yourself in their culture.
I always figured there would be a caste system.
Something along the lines of (males only):
Slave, Property
Commoners, they earn their food by working for a clan: ship maintenance, builders apprenticeships, or for a noble.
Specialist Artisan/ Engineer/ Makers of complex items, mostly ship parts.
NobleMan- The lowest of the NobleClass, dived again.
-Pup, Student
-UnBlooded, has hunted, but still learns
Healers
-Young Blood, Passed manhood ritual, is now a man and self reliant, can mate
-Hunter/Blooded, Matured blooded
Shaman, Spiritual guides
Warrior, the next NobleClass, hunt less for sport and trophies, instead tend to clan matters, fighting other clans, and enacting Elder orders.
Elder, final NobleClass, must complete a second Hard Meat ritual, (one where they have a chest burster implanted within them, surgically removed, and then they face it) and now, as one, or with a council, govern the tribe.
Within the same caste, older means higher rank.
Females:
Slave
Commoner
Specialist Artisan/ Engineer/ Makers of complex items, mostly ship parts.
Prostitute
Nobles
Shaman, Spiritual guides
Polytheistic.
Children are reared by both parents, or abandoned if not in the noble class. Your parents class determines your class.
Below only applies to Nobles:
There is no such thing as a slut in Predators, unless you sleep with someone unworthy of you.
The culture is very sexual, Grecian levels.
After impressing a female, a youngblood+ male will be allowed to mate with her.
If the child is female, the male will appear in the child's life, but not rear her, or have a stake in her life. She will live and learn with the mother until she is an adult.
If the child is a male, the Father will be present, same as a daughter, but will take the child when he is equivalent to & in humans.
If the Father dies honorably, the child rearing is then the responsibility of one of the Father's hunt brothers. (Always in groups of three, Chopper, Celtic, Scar. Or Berserker, Falconer, Tracker)
If the Father dies dishonorably, the child is abandoned.
If it is born sickly, it is abandoned, or discarded.
Male are reared very spartan. He is taught, and trained, by his Father until he passes the hard meat trial.
All equipment/ weapons before the completion of a youngblood trial, are hand made by the user.
Currency exists
Tribes war, and align.
All I have for now.
