Microdictyon umbilicatum
Protoctista | Anadyomenaceae | Microdictyon | Microdictyon umbilicatum
coral rocks.  In small tufts to 3 cms high with crisp fronds curved inwards as if formed from a ruptured hollow sphere. -- Originally identified as Microdictyon agardhianum
[Pacific; Malesia; Singapore; Pulau Hantu