The study looked at how male squid adjust their sperm numbers and sizes based on the risk of competition. Two squid species were compared, with one type of male squid transferring sperm to a female's oviduct and the other near her mouth. Sneaker males faced higher competition risk. Results showed that sneaker sperm had longer flagella in one species due to storage challenges. Sperm number was influenced by competition levels, while sperm size was affected by the way sperm is stored and fertilization processes. Overall, the study revealed how squid males adjust their sperm traits based on different mating tactics and the chances of sperm competition.