Coral spawning patterns in the Gulf of Thailand reveal synchronised annual daytime spawning, with a review of spawning patterns in Pavona corals across the Indo-Pacific
Fig 2
Photographs of daytime gamete release of corals recorded along the Eastern Gulf of Thailand.
A) Egg release by partial colony of Pavona varians (scale bar 50 mm); B) Simultaneous egg and sperm release by a hermaphroditic colony of P. varians (scale bar 50 mm), red box indicates portion zoomed in for (A) to more easily differentiate egg release from sperm; C) Near-transparent egg-release (red ellipse for example) by polyps of P. explanulata (scale bar 10 mm; photo by Thomas Thana Real); D) Whole-colony sperm release by P. explanulata (scale bar 50 mm); E) and F) Photos taken five seconds apart before and during gamete release by Cycloseris sp. (scale bar 50 mm); G) Sperm release by Dipsastraea sp. (scale bar 50 mm).