Pajama cardinal fish rest during the day and hunt tiny fish at night. “Of course they do,” my friend Lani said. “They’re in their pajamas and having a sleepover.” The fish were inactive because the ...

From a ballet of whitetip reef sharks to a male cardinal fish releasing freshly-hatched babies from its mouth, these winning underwater photos are a revelation of our oceans’ wonders. "Synchronicity," ...

It might look like this tiny fish is casting its very own Patronus, but what you’re actually witnessing is just as intriguing. When the cardinal fish regurgitates ...