Serranidae: L III B4

Epinephelus malabaricus (Schneider, 1801) and E. andersoni Boulenger, 1903

Malabar rockcod

Egg diameter in µm	Number of oil globules	Diameter of oil globule in µm	Yolk texture	Perivitelline space	Position of oil globule at hatch	Gut length   at eye- pigment stage	Myomeres
840-950	1	170-200	clear	narrow	stern	53% of NL	24

Egg: When fresh, the egg has a yellow hue, and a pink oil globule. The yolk surface is rough. Usually no pigment is seen on the developing larva within the egg (A). Incubation is 30-35 hours.

Larva: This larva was separated from LIIID2, purely on the basis of the lack of yellow pigment in the mid-tail. Careful examination on a white background, will reveal black pigment along the notochord, which gathers over the gut and mid-tail in the 3-4 day larva (C & D), at which stage the larva was noted to be slimy, and to curl when harassed. The stringy wedges of white pigment in the finfolds in mid-tail, are also characteristic. B: 1 day, C: 3 days, D: 4 days, (24°C). Plate E: 4 days : Epinephalus andersoni ex ORI

The larva of E. andersoni is included here, because the NH larva, from the ORI eggs, did not have yellow pigment on the mid-tail. However it also did not have the white wedges of pigment in the finfolds (E). Locally collected adults of Cephalopholis miniata, C. sexmaculata  and C. sonnerati, Epinephelus albomarginatus, E.  andersoni, E. caeruleopunctatus, E. chabaudi, E. fasciatus, E. flavocaeruleus, E. macrospilos, E. malabaricus, E. marginatus, E. posteli, E. rivulatus and E. tukula, and Variola louti have all been sequenced (BOLD reference). Of the three larvae barcoded to date, 1 each, matches andersoni, malabaricus and marginatus from the above list (BOLD reference).

linked samples	Offshore	Inshore
Eggs	20	13
Hits	9	9

This egg was uncommon off Park Rynie, and only seen in small numbers per sample. Late winter and spring were the peak spawning times (blue graph). It was not seen in the DHM samples. The Park Rynie linked samples showed slightly more of these eggs offshore (61%), indicating spawning in 20-30m water depth (but from very low numbers). See Section 7.3 and Table 1 of the Introductory Notes, for more information on the linked samples.