If you’re on a bay or river, the tide could end up being halfway opposed to what a clock like this is telling you. I.E. it says you’re half way between high and low, but the water is still high.

Sea lice have separate 'tide' clocks, Aberystwyth scientists find. Published. 26 ... "The discovery of the circadian clock mechanisms in various terrestrial species from fungi to humans was a ...

Some marine invertebrates have at least two internal clocks, which follow different times and have different mechanisms, according to two new studies. Multiple timepieces might prove common among ...

The General Manager of the West End Development Corporation [WEDCO], Andrew Dias, said the work on the clock and tide mechanisms was a $200,000 restoration project.