Yes the one with more red is female.The male has colored up even more since that vid.His yellow looks closer to her color now.They are aggressive towards other fish during spawning.I removed all the other fish from that tank.Some are even aggressive towards their spawning partner (some have had pairs that kill one another) but so far they haven't been real aggressive with each other.Compared to jacks or greens i would prob say its just according to the fish as each fish is different just as people are.Btw the fry is free swimming now.Just a guess but looks to be about 150 fry and both the parents are doing good with the fry.