They were so big and the water was so shallow that they bucked across the bottom like king salmon moving upstream through a shallow riffle.

The preferred habitat of adult Neosho madtoms is shallow riffles with loose, uncompacted gravel bottoms.

Water levels often drop off by mid-summer, making it necessary to drag watercraft over shallow riffles.

Stonecats spend the majority of their time in moderate-moving, shallow riffles.

Young Clanwilliam yellowfish (below 4 cm/1.6 in long) are found in backwaters and shallow riffles.

During that time, adults repeatedly move in small groups into shallow riffles where the water is only a few decimetres deep, and deposit their non-sticky eggs there.

The jetboats could safely negotiate shallow riffles, and the largest could carry nearly 50 passengers.

Except for two common mergansers patrolling a shallow riffle downstream, not a soul was in sight.

Appears to avoid mountain streams with steep gradients, preferring shallower riffles running over small pebbles.

Juvenile Tippecanoe darters are displaced into shallower riffles, chironomids may be more prevalent in these areas.