Octopoteuthis deletron, living at depths of up to 800 meters, has a very short period of sexual maturity. Therefore, males have developed a breeding strategy, in which they do not understand who is in front of them - a female or another male. Encountering in the darkness the calmar of its kind of any sex, they attack it and smear with spermatozoa, that is, capsules with spermatozoa.