Japanese Sea Nettle

(Chrysaora pacifica)


This jelly's bell can be clear to brownish-orange, with dark lines radiating from the top of the bell to the bottom. This species is often confused with the similar-looking—but much bigger—Northern sea nettle.

Although not very venomous, their sting can cause an allergic reaction in some people. Their stinging cells, which are called nematocysts, are powerful, capable of causing serious skin irritation and burning sensations.

A Note from the Caretaker

Juveniles of this species lack stripes. Their stripes start to appear when the diameter of their bell reaches about 2 centimeters.

Quick Facts

Learn more about the Japanese sea nettle! Did you know that this jelly's tentacles can grow to a length of 10 feet?

This sea nettle can be found in the Pacific Ocean near Japan.

They feed on zooplankton, including small crustaceans and other jellies.

The bell of this species can measure up to 12 inches wide. Tentacles on giant specimens can reach as long as 10 feet.

In the past, jelly populations were kept in check by predators like sea turtles and jelly-eating fish. Due to the reduction of their predators, jelly populations are growing at alarming rates.

Sea turtles and other jelly-eating animals such as tuna, sunfish, butterfish and spiny dogfish keep the jelly populations in balance. All seven species of sea turtles include them in their diets. The largest sea turtle species, the leatherback, depends on jellies for food. Because jellies are more than 90% water and an adult leatherback can weigh more than 2,000 pounds, one turtle can consume a lot of jellies.

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