Are there male and female jellyfish?

[sorgoth]

The scientific america website says:

Jellyfish reproduction involves several different stages. In the adult, or medusa, stage of a jellyfish, they can reproduce sexually by releasing sperm and eggs into the water, forming a planula.

So, does the same jellyfish release both sperm and eggs, or do you need a male jellyfish and a female jellyfish?

[BTox]

According to this source, yes there are male and female jellyfish.
jellyfish (http://www.ucmp.berkeley.edu/cnidaria/scyphozoalh.html)

A bigger question for me is how SpongeBob gets strawberry jelly by milking the tenacles of jellyfish?;)

[sorgoth]

Thanks. That's been bugging me for a while.

And the answer if, the same reason why he has pants.

[SquishyDave]

Same reason why he has square pants.

[tracer]

The title of this thread reminded me of an old Far Side (by Gary Larson) cartoon.

Two outhouses. One with a picture of a jellyfish on the door. The other with a picture of ... another jellyfish on the door. Many jellyfish are swimming around. The caption reads, "Only they can tell."