Current · Top of a bed, Cross section

Symmetric (wave) ripples

Ripples with both sides of similar slope, often with sharp crests and rounded troughs.

Schematic, not to scale

How it forms: Two-way, oscillating flow such as beach swash and backwash or wave action in shallow water.
Typical setting: Beaches and other shallow water with wave action
Way up: Crests are sharp and point up; troughs are rounded.
Flow direction: No. Not used for current direction.

Photo examples