Experts say there’s no plan to remove hungry mola mola from Pleasure Bay off Castle Island

What swims around Pleasure Bay gobbling up sea jellies?

A mola mola, which was first spotted Tuesday in the watery corral.

New England Aquarium spokesman Tony LaCasse said he believes the mola mola went into the bay, which is just off Castle Island in South Boston, to eat the large population of jellies that have been making their home there.


The mola mola, also known as a giant ocean sunfish, is uninjured, which means the aquarium will not remove it. LaCasse thinks it is likely the mola mola will leave when the number of sea jellies dwindles.

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LaCasse said he saw the creature swimming in a zigzag motion as it grazed.

Some experts believe the hungry mola mola is a juvenile and probably weighs a few hundred pounds or more, said LaCasse. He described the creature as a “giant, thick disk.”

LaCasse said anyone who sees this mola mola, or any other, should be unobtrusive, but “grab their phone cameras.”

Melissa Hanson can be reached at . Follow her on Twitter @Melissa__Hanson.