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Close-up of a giant pacific octopus' suction cup-covered arms

Things that stink and suck

Feb. 17, 2021

We have to admit it: sometimes things just stink—and sometimes they really suck! We're choosing to embrace it by celebrating everything from smelly low-tide odors to vacuum-like bottom feeders. Consider this our love letter to all the smelly, sucky awesomeness in the ocean.

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A beautiful California gray whale sends a heart shaped exhale into the Pacific air

Hole-y halitosis!


The humpback whale is one sweet cetacean. When it exhales, it expels a plume of mist that can create a rainbow effect. It may sound charming, but the scent of this cetacean’s breath will leave you broken hearted. It's going to take more than a breath mint to cover up this whale-sized halitosis.

Underside of a giant Pacific octopus, one large arm coiled, eye peeking through, with some suckers visible

A sucker for sea scents

You probably knew octopuses have three hearts, but did you know they also have over 2,000 nostrils? That’s right, each sucker on an octopus's arms contains chemosensory cells that can detect scent molecules. So as an octopus explores with its arms, it’s also sniffing out its next meal.

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See how nudibranchs and bat rays smell and suck

Sweet-smelling slugs

Nudibranchs are known for their dazzling colors and spectacular patterns, but did you know that some of them also stink? The lion’s mane nudibranch, for instance, has a scent reminiscent of watermelon candy—an uncommon smell in the briny ocean world. Another fragrant nudibranch is the sea lemon, whose citrus smell might get you craving a lemony treat. But what smells delicious to us is repulsive to potential predators in the sea. For a sea slug, being stinky also means staying safe!

Suction and filtration never looked so cute

Sometimes it’s important to suck, especially when that’s the way you get your food. A bat ray is like a little vacuum along the seafloor, slurping up clams, crabs and other bottom-dwelling critters as it moves its cute little mouth along the benthos.

For other animals, sucking is a way of life. Filter feeders like sponges, tunicates, mussels and clams spend all day sucking water into their bodies and filtering out a meal of delicious plankton and detritus.

Tangled mounds of dried seaweed washed ashore along a sandy beach

A stinky shelter

Our noses may rebel at the smell of kelp wrack—those stinky piles of algae on winter beaches buzzing with flies. But it sustains shorebirds and other beach creatures—and it performs an amazing feat! When it washes away, it sinks to the deep sea, feeding sea floor animals and locking away tons of carbon.

Two Aquarium staff placing the red cylinder pig into the pipes

Our water system sucks

How do we get over a billion gallons of sea water into the Aquarium every year? We suck it in! Two pipes that lie on the seafloor just off our back deck suck raw sea water, packed with nutrients and food, directly into the underbelly of the Aquarium. From here the water flows throughout the Aquarium’s exhibits, supporting our nearly 80,000 plants and animals.

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