The burrows of mudskippers at Pasir Ris were ringed with 'white mud' today. How strange!
Giant mudskippers (Periophthalmodon schlosseri) dilligently dig impressive burrows in the mud. They do this by tirelessly spitting out mouthfuls of mud from deep in the mud. Usually, the mud that is spat out from below is grey. Today, I only saw these two burrows with the typical grey mud around the opening.
The white mud is probably the commonly available kaolin type of mud previously used to fill up this 5-ha mangrove forest. Some of the other darker white patches may be due to the accummulation of elemental sulphur that did not get wash awa by each tidal inundation. The sulphur is a result of the anaerobic bacterial activity (from Hydrogen sulphide).This mangrove forest still lacks an appropriate tidal innundation of sea water. You need the sea water to wash away, periodically, the white elemental sulphur accumulated at the middle and back mangrove areas. Thank you Dr Yong!]
I was trying to take better photos of these large and common mudskippers. Especially with their dorsal fins raised. I had no luck today even though there were very many Giant mudskippers at Pasir Ris.
Berembang (Sonneratia caseolaris) are very tall now and blooming and fruiting! A great opportunity to photograph the flowers and fruits in various stages of development. I probably need to visit one night to catch the night-blooming flowers at their full glory.
Gedabu (Sonneratia ovata) was also fruiting, with some buds ready to bloom.
Tumu berau (Bruguiera sexangula) was blooming and 'fruiting' too!
Lenggadai (Bruguiera parviflora) was blooming and also forming propagules!
Bakau putih (Bruguiera cylindrica) has small short flowers which develop into propagules with the calyx bending away from the long green part.
There's many guided walks and other interesting activities at the Park. Check out the NParks website and wildsingapore happenings (enter "Pasir Ris" into the search bar).
Some exciting upcoming events at Pasir Ris include: