The photo Morrison posted was of a group of small school children lined up together, each holding a rope and moving along.
The Marlins first baseman used humor to express his point, but he added on Friday that the team is bonding.
"Everybody likes everybody, but winning helps," Morrison said.
The Marlins just added two more young players in promoting outfielders Christian Yelich and Jake Marisnick from Double-A Jacksonville.
"I think everybody knows who Christian is and everybody knows who Jake is," Morrison said. "They're great guys and great baseball players. They're going to only help us."
Morrison said the young players constantly pick on each other, as well as engage in a friendly competition.
"I hear the pitchers making fun of each other all the time," Morrison said. "The best part about having all these young guys is, not only are they making fun of each other, they're competing with each other."
Morrison noted that Tom Koehler recently saw the other starting pitchers throwing 96 mph, so it motivated him to do his part. Jose Fernandez and Jacob Turner are two right-handers in the rotation who are showing more personality with the club.
"Koehler is like, 'All these guys are throwing 96, so I have to bust 96 out,'" Morrison said. "They're all bulldogs in their own way. Fernandez is more outwardly about it. But Turner is probably the opposite. But he's still a bulldog."