Once a year the mermaids gather to witness the "Ritual of Hooks".
During this event a mermaid is bound in fishing line laced with countless fish hooks. She is then tied to a sunken Ship often a fishing vessel where she is then left for the remainder of the day in full view of the other mermaids.
I have come to the conclusion that this ritual came around during the time mermaids were hunted by sailors and fishermen and serves as a reminder to the next generation of mermaids the danger of getting to close to humans, resulting in the decline of mermaid sightings and interactions with humans.
thanks to reine-haru.deviantart.com/
for the reference photos to help me illustrated this event
created in watercolours
will be up for sale and with prints once ive sorted everything.