Looks like Littorina obtusata. They have a flat spire and are often yellow and thus are referred to as the "jewel of the intertidal". They rely on rockweed and lay their eggs on it - maybe you'll find some if you look next time- they are white, kidney-shaped masses.
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Looks like Littorina obtusata. They have a flat spire and are often yellow and thus are referred to as the "jewel of the intertidal". They rely on rockweed and lay their eggs on it - maybe you'll find some if you look next time- they are white, kidney-shaped masses.