<p>A juvenile jellyfish floats in dark Polynesian waters. Jellyfish are an ancient kind—they may have been around 400 million years before the dinosaurs, according to the&nbsp;<a href="http://www.smithsonianmag.com/science-nature/14-fun-facts-about-jellyfish-67987765/">Smithsonian Institution</a>.</p>

Baby Jelly

A juvenile jellyfish floats in dark Polynesian waters. Jellyfish are an ancient kind—they may have been around 400 million years before the dinosaurs, according to the Smithsonian Institution.

Photograph by Tim Laman, Nat Geo Image Collection

Pictures: 10 Unusual Baby Animals You Don't See Every Day

Frisky puppies and fluffy kittens don't have the corner on cute—baby eels, boars, and baboons are just as aww-worthy.

Spring means droves of baby animals making their way into the world, on four legs, two legs, or—in the case of jellyfish—no legs at all.

But frisky puppies and fluffy kittens don't have the corner on the cute market—other new arrivals can be just as aww-worthy. (See "4 Baby Bird Cams You Should Watch This Spring.")

Keep clicking for more unusual babies from the animal kingdom.

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