Shoal of fish?Theres normally an explanation for the unexplained

in the early 90's i was based in Hong Kong,a fishing boat radio'd shore and reported it had caught a mermaid

people waited for the boat to come in,i never found out the end of the story or the who/why/what of the tale but no mermaid was produced,the philippines has also had loads of mermaid sightings,in that instance my guess is its allways dugong or sea-cows,i always had an interest in cryptozoology,when i was in borneo i heard tales of the orang-pendek the malay version of the yeti or big-foot,never saw anything despite sleeping in the jungle.