they found that the salinity levels inside the Kealia Pond are currently greater than 70 parts per thousand, which is twice the salinity of regular seawater. Mysterious 'Skin-Like' Golden Orb ...

So when a higher-than-usual king tide occurred on Saturday, it carried more seawater into Upper Pond than normal. Because it’s colder and saltier, seawater is also denser than freshwater ...