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Freshwater Sandhopper (illustration)
Freshwater Sandhopper (image)
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Freshwater Sandhopper
They are so-called because they seem to hop or flip when disturbed in the water or picked up.

What they look like:
Freshwater Sandhoppers look like Slaters. As they resemble large fleas, they’re also known as beach fleas. They are slightly curled and flattened sideways. They have hard segments (rings dividing their body), each with a pair of legs. Sandhoppers have seven pairs of walking legs and three pairs of swimming legs, plus two antennae.

Size:
6-20 mm long.

Where they live:
Freshwater Sandhoppers prefer still or slow-flowing waters and live under vegetation and rocks. Some species live in estuaries, the sea or on land.

What they eat:
Freshwater Sandhoppers are omnivores (om-nee-vorz); they mostly eat dead plant and animal matter, but they will also eat other animals.

Pollution tolerance: Tolerant, rating 3.
Freshwater Sandhoppers cannot tolerate chemical pollution. Pollution damages their delicate gills, which they use to breathe.

What’s interesting about the Freshwater Sandhopper?

  • They swim by flicking their tail. When they crawl, they often lean to one side because they are flattened sideways.

  • Sandhoppers that occur on land also have gills so that they can breathe. Gills need water in order to work properly, so the land-based sandhoppers have to live in a damp environment.
Where they fit in:
> Phylum Arthropoda > Class Crustacea > Order Amphipoda
 
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