The waters off mainland Australia never fail to provide diver Jules Casey with beautiful sights, but on May 20, she came across quite a find.

While diving off Port Phillip Bay, Victoria, she spotted a juvenile leatherjacket fish hiding in the underside of a Haeckel’s jellyfish. The resulting video, uploaded to Instagram, shows the tiny fish flapping to stay close to the jellyfish as it swims through the clear waters. Credit: onebreathdiver via Storyful