Blue Symbiote (1) (Mayhem): In the comics Mayhem was a biologically reengineered being as a human and symbiote hybrid. The character April gave herself the name Mayhem to operate under in her superhuman activities, but she died in an explosion while fighting
Toxin. The other symbiote alongside Riot, Scream and Phage is a blue and gold one, which - as initially shown in the Venom trailer - was set loose on unwitting test subjects.
Capabilities. As a Symbiote, Blue was able to bond with virtually any life-form, can emulate its host and even enhance their abilities. The symbiote doesn't need to mate either and can reproduce asexually.
Detective Mulligan's eyes light up blue in Venom: Let There Be Carnage because in this very (very) brief scene, it is implied that Mulligan has become the host to a new symbiote. The symbiote in this instance is Toxin – one of the many symbiotes from the Marvel Universe.
In addition, Venom has come out on top as the victor in many battles with Symbiotes like Carnage, Hybrid, and Scream (all of which are arguably more powerful than he is).
Agony is largely dark purple with dark pink mix symbiote, it grants its host with claws, a blade along the fur end of the forearms, fangs and fairly long prehensile hairs, as well as manipulate its body into various form.
Eventually, the symbiote and its host came to an agreement that allowed them to co-exist somewhat peacefully. Toxin is a red and black symbiote.
It's generally been accepted that symbiotes having separate colors is merely an easy way to distinguish one symbiote from another to a point that the Mighty Avengers: Venom Bomb arc treats them as interchangeable.
The seventh spawn of the Venom symbiote, Sleeper was the result of an unusual and difficult pregnancy. Delivered by Doctor Steven at Alchemax's astrobiology laboratory, the infant symbiote narrowly avoided being captured by the Symbiote Task Force and bonded to the Scorpion.
This time Venom is blue and has black outlining which enhances the details. If the colours were reversed, then Venom would look bland (consider the time of printing and the artwork).
During the fight, Mulligan is apparently killed by Barrison, but absorbs a piece of one of the symbiotes, which later revives him and causes his eyes to glow blue.
Carnage is Venom's offspring. That is why Carnage often calls him “Pops” or the like. Like a previous poster stated Venom feels responsible for Carnage and Carnage hates his “dad”.
The character was introduced as the fusion of four symbiotes (Lasher, Phage, Agony and Riot), bonded to prison guard Scott Washington.
Venom has always held the distinction of being Marvel's scariest symbiote, but Carnage was never far behind him, and it seems Carnage might have finally passed Eddie Brock.
They rapidly age the symbiotes and pair them to people: Scream (yellow, female), Agony (pink, female), Lasher (green, male), Riot (grey, male) and Phage (orange, male).
The Donna Diego incarnation of Scream, referred simply as "Female symbiote", was featured in Marvel's comic book trading cards in the 1990s. The Donna Diego incarnation of Scream was featured in OverPower' "Mission: Separation Anxiety" series.
Why is black Venom afraid of red Venom? It could be that in the universe of the Venom movies, this type of strong bond is already known among the symbiotes to result in stronger specimens. This could explain why Venom is so fearful of facing an enemy with a ruddy hue.
Venom has bonded with everyone from Deadpool to Captain Marvel, but the symbiote's most powerful host was inarguably the Void.
Who would win in a fight between carnage and riot? Carnage does have more abilities, but was like a rampaging kid and Venom ate it to kill it. Riot was cunning, and was even able to rip Venom from Brock and would have eaten him if Brock didn't rebond with it.
Venom Eats Carnage - Fight Scene - Venom 2: Let There Be Carnage (2021) - YouTube.
Carnage is Venom's son. Like most organic beings, Venom's race known as the Klyntar also reproduces and creates other symbiotes. Venom spawned an offspring while he was rescuing Eddie Brock from prison. The newborn symbiote bonded with Eddie's cellmate Cletus Kasady and became Carnage.
Many of the Symbiote species have their own unique colours, Anti-Venom is white, Sleeper is green, Scream is Yellow, Venom is Black, and Carnage is red. But there is a specific reason as to why Carnage is red in Venom: Let There Be Carnage and it relates to his origin story in the comic books.