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Throughout their lifecycle, jellyfish take on two different body forms: medusa and polyps. Polyps can reproduce asexually by budding, while medusae spawn eggs and sperm to reproduce sexually.
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Jellyfish Lifecycle and Reproduction

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Coral Sand
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Coral Sand Under a Microscope

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An octopus in the open ocean
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Octopus in the Open

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Guests at Smithsonian's Natural History Museum's 2010 sustainable seafood event
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Guests at Smithsonian's 2010 Sustainable Seafood Event

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Cartoon t-shirts with got plankton.
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The Cloud Factories that Live in the Sea

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Two baby olive ridley sea turtles.
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Surveying Life On Sea Turtles

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The "Lower Invertebrates" exhibit in Smithsonian Institution Building in 1901 included models of a giant squid and an octopus.
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More Than a Century of Smithsonian Marine Science

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a diagram showing the parts of an ocean wave
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The Anatomy of a Wave

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shallow pans carved out of the sea coast create many pools with a seascape in the background
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The Salt Pans

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A close-up image of the face of a whitemouth moray eel.
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Whitemouth Moray Eel

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a graphic of a boat towing a trawl
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Demersal or Bottom Trawl

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Chuniphyes are siphonophores—colonial organisms in the same phylum as jellyfish, working together to survive.
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Ultimate Teamwork

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