The R&B singer and songwriter also wrote that he would hold a performance on Instagram live.
The pop star revealed that she will donate to the Temple University hospital and Los Angeles' COVID-19 relief fund.
"There are years when blooms or populations of a jellyfish are high and there are also years when they are few or even almost absent," said Sheldon Rey Boco, who filmed the event.
The photo was taken by wildlife photographer Kristian Laine, who spotted the uniquely pigmented ray near Lady Elliot Island.
Pink grasshoppers rarely make it to adulthood as the coloring, caused by a condition called erythrism, makes them easy targets for predators.
Meanwhile, other celebrities shared emotional social media posts about the crisis.
While attending the Country Music Association Awards on Wednesday, Pink dubbed 2020 the "year of the family" and said she'd be taking a break from music at the end of 2019.
"I'm still massively in shock, just a bit gutted I missed the concert," said Denise Jones. "But I couldn't be any happier right now!"
"She came down the stairs and gave me a big, long hug."
After online outrage, Portnow has backed off his controversial statement that women in music need to "step up."