The scuds seem to intentionally get buried in the sand near the sand-boils. Here is a photo of a scud waiting to be buried by the sand spewing from a sand-boil.
Watch this underwater video of the scuds, or amphipods, as they sink into the sand (to the right of center) and soon one gets shot out on the left of the sand boil.
aquatic creatures in the sand spring, scuds are also called "side-swimmers".
Here is a photo showing a side-swimmer in action.
The scuds can also hang out on their sides.
Take a close look at this macro shot of a scud... I took the photo to show the nasty-looking claws on the scud's front legs.
Male scuds are commonly seen carrying around female scuds (amplexus).
That's alot of scuds!
Maybe someday we'll try to calculate how many scuds per square foot and perhaps we will also investigate why these abundant amphipods congregate in the sediment like this.
See the first post in this series about aquatic life in a spring.