This big male Sealion rolled over and knocked the female on the right off the dock and into the water! There were several sealions of different sizes and ages snoozing on the dock. There were 2 adult males, like this huge dark brown one. Adult males are huge, they may reach 850 - 1,000 lbs. and grow up to seven feet in length. Females can grow to 220 lbs. and up to six feet long.