Sea lion pulls off brazen tuna heist as fisherman tries and fails to hold onto his first big catch

Everyone remembers the kid who stole other people's lunches in school. As it turns out, sea lions never really outgrow that phase.

A viral video making the rounds online shows a fisherman celebrating what appears to be his first-ever yellowfin tuna. Unfortunately for him, a massive sea lion had other plans.

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As the angler proudly poses with the fish alongside the boat, the opportunistic marine mammal suddenly emerges from the water and makes a beeline for the tuna.