The image of a gold -fish which is putting bubbles out of its mouth in the water. This animation is implemented by the function called "animateMotion" of "SMIL". A bubble are going up along a path indefinitely. As the path has no "fill and stroke-width", you can't see it on browser.
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Bubble-animation-SMIL free icon was designed by yamachem for icons Png and presented to its users.
yamachem
2/24/2018