When the current is strong

Today, we dove into a very strong current.  And I noticed that many fish species seemed to modify their behavior in response to it.  We often see quite a few mahogany snapper, about 10 inches long, pictured below.

Normally, they swim in the water column, spaced apart.

Today, they were plastered together behind corals, rocks, and sponges to save energy, and stay out of the strong current. Here they were seeking refuge behind a rope sponge, and to the right, in the distance others were seeking refuge below coral rocks.

They did seem to pay attention when a predator, a great barracuda swam by.