With bonus trilobites

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A gif of a small pixel art stamp with a blue background. An Aegirocassis, Anomalocaris and Cambroraster swim and move their mouthparts, gently floating up and down. Two small trilobites sit in the top right and bottom left corners, turning around whenever the large Aegirocassis floats closer to them and small exclamation marks appearing next to them. Marine snow falls behind them