-
Singapore, South West, Singapore
-
Exmouth, Western Australia, Australia
-
Simei, North East, Singapore
-
Exmouth Gulf Airport, Western Australia, Australia
-
Pulau Tekong, South East, Singapore
-
A Typical northern Red Sea T.gratilla elatensis. It is unique in several aspects: It is flatter than T.g.gratilla, It has less spines, and many more pedicellaria, covering its interambulacral plates. Coloration variable- spines, tubefeet and pedicellaria coloration each range from pure white to pitch black (in this picture spines are reddish, as well as tubefeet, and pedicellaria are white - all combinations occur in nature), This variety was observed througout the entire north and middle Red Sea. In Eilat, this sea urchin was prone to mass sea pollution that affected the calcification processes as well as the softer collagenous tissues activity, causing extreme deformities. The deformities were of two types - type A exaggerated H/d ratio and showing severe skeletal deformities; and type B, aboral depressions in which the entire aboral part of the test collapsed. These deformities disappeared when the poluting agant were removed.
-
Bedok, South East, Singapore
-
Test, lateral view
-
Scientific name: Pseudoboletia maculata
-
Singapore, North East, Singapore
-
Oral view showing shield-shaped subanal fasciole
-
Kampong Pasir Ris, North East, Singapore
-
Pasir Panjang, South West, Singapore
-
Singapore, South West, Singapore
-
Exmouth, Western Australia, Australia
-
Exmouth, Western Australia, Australia
-
Pulau Tekong, South East, Singapore
-
Bedok, South East, Singapore
-
Lateral view
-
Onna, Okinawa, Japan
-
Scientific name: Astropyga magnifica
-
Kampong Pasir Ris, North East, Singapore
-
Pasir Panjang, South West, Singapore
-
Singapore, North East, Singapore