[2][3][5] Rosa was characterized by her large figure with soft silver colored fur and white freckles on her head.

[2][6] She could be seen on the aquarium's live sea otter cam and normally rested on the water surface at the center window after feeding.

[4] Rosa received a physical checkup three times a year with radiographs, blood tests, and dental care.

[8] Some of the otters at the Monterey Bay Aquarium, including Rosa, are named after John Steinbeck characters.

[11] Since Rosa's 20th birthday in 2019, Twitch streamer and YouTuber Douglas Wreden, also known as DougDoug, had hosted annual charity livestreams to raise money for the Monterey Bay Aquarium.

[16] At the time of her death, she was the oldest sea otter at the Monterey Bay Aquarium at 24 years 9 months.