Creediidae: M III A7

Limnichthys nitidus Smith, 1958

Sand submarine



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








59% of NL

ca 45


Egg: In this size range, this is the only egg seen off Park Rynie, that has the oil globules clustered against the gut of the embryo (A) like a bunch of pale amber grapes. There are about 5 blotches of pale yellow-white pigment from nose to anus, but the tail has two continuous lines of yellow dots which converge at the tip of the notochord. Incubation is 24-30 hours.

Larva: The 1-day larva is elongate, with a moderately long gut and prominent white pigment patches on the finfold edges (C). The caudal finfold pigment is unusual (C). Both the 2-day and 4-day larvae have this extending to a ring of pigment edging the caudal finfold (D & E).  C: 1 day, D: 2 days, E: 4 days (23°C).

Attempts to rear this egg were unsuccessful. Two hatched larvae have been barcoded, and they match 6 locally collected adult Limnichthys nitidus (BOLD).

Linked samples Offshore Inshore
Eggs 197 349
Hits 76 165

This species spawns all year round, but the eggs are never seen in big numbers (blue graph). The eggs have remained fairly constant off Park Rynie over the study period (white graph). It was only seen twice in the DHM samples, in June and July. The Park Rynie linked samples had the majority of these eggs inshore (64%), indicating spawning in 20m water depth, although one of the barcoded adults was collected at 55m. See Section 7.3 and Table 1 of the Introductory Notes, for more information on the linked samples