Published on 20 March 2026

No brain, no bones, no central nervous system. Yet behind the delicate beauty of sea jellies lies a world of complexity that makes caring for them one of the most challenging jobs in an oceanarium. Or some say, in the world.

And who better to spill the tea than a Sea Jelly Specialist? So here goes.

1) Only Gentle Hands Need Apply

Sea jellies are 95% water. One wrong move in their habitat—a splash, a bubble, a strong current—and it can be deadly. 

That’s right. Even air bubbles are a sea jelly’s enemy. A single bubble trapped in its bell can damage its tissues.

Every adjustment, every tube and hose, must be carefully managed. Even feeding is a balancing act: too much, and they sink; too little, and they starve.

Think caring for toddlers is tough? Try sea jellies.

2) Patience, Precision, Finesse

Sea Jelly Specialists spend surprising amounts of time doing what looks like “jelly babysitting”: nudging a drifting jelly upright, tweaking currents by millimetres, or figuring out why the whole group suddenly decides to gather in one mysterious corner.

Then there’s breeding, which is probably THE biggest challenge. Sea jellies aren’t born as jellies. They start as tiny polyps that look nothing like their adult selves. Think of them as the “caterpillar stage” of a butterfly. But sometimes, these polyps simply refuse to transform.

Triggering that change feels like a mad scientist experiment: different temperatures, routines, timings, hoping for the right combination. Every species has its own secret recipe. The moment it finally works? Pure triumph.

3) Conservation and Collaboration

Caring for sea jellies isn’t just about keeping them alive. It contributes directly to science and conservation. By monitoring their life cycles and behaviour, Sea Jelly Specialists help researchers understand jelly ecology, plankton dynamics, and the effects of climate change.

Through partnerships with universities and research institutions, every successful culture adds to global knowledge. These insights can even inspire medical advances and inform how we protect our oceans.

Cool huh?