Recovering the Mudflat Habitat of Horseshoe Crabs in Ha Pak Nai
Recovering the Mudflat Habitat of Horseshoe Crabs in Ha Pak Nai

Over 1000 lbs of oyster farm debris was removed from the horseshoe crab's natural habitat in Ha Pak Nai on 31 October 2010, following a joint clean-up by OPCFHK, Mr. Kevin Laurie and the PLK Laws Foundation College. This clean-up is vital to the wild horseshoe crabs living at Ha Pak Nai and will make life easier for the newly released ones in 2011.


A year ago before the clean-up (c) Kevin Laurie 1,000 lbs debris removed! (c) Kevin Laurie
Briefing was made before the clean-up by Mr. Kevin Laurie and OPCFHK Deputy Director Mr. Timothy Ng
Removing oyster shells and debris to allow growth of sea grass, an important nursery ground for juvenile horseshoe crabs.
Off we go for the clean-up. Gear up with boots, gloves and buckets! Leave no traces except footprints.
Kevin collected the wild horseshoe crabs in the morning and they stay safe in the bucket whilst we clean their habitat, before returning them into the wild. Though as small as 5 cm in diameter, it took them over a year to grow to this size.
Molts and specimens Kevin collected from the mudflat or from fishermen. Students were curious about the specimens.
Wild horseshoe crabs hide in the mud and leave a trail.
Another round of clean-up before the tide comes. The oyster shells trap excess carbon dioxide in the ocean and act as buffers to help maintain a healthy pH for the oceans, they will break down slowly to supplement the ocean's natural carbon cycle.
Returning the horseshoe crabs to the natural habitat after the clean-up.
OPCFHK is sponsoring a Juvenile Horseshoe Crab Rearing Programme where students were given the opportunity to take care of artificially-bred horseshoe crabs before releasing them into the wild. This programme was a joint effort of Ocean Park Academy, City University of Hong Kong (technical advisor) and OPCFHK to promote horseshoe crab conservation.