Carangidae: E III A7

Scomberoides tol (Cuvier, 1832)

Needlescaled queenfish

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








53% of NL


*not confirmed

Egg: The big oil globule serves to separate this egg from all except the Mugilidae, with which it is easily confused LIIB9, LIIIA7 & LIIIB7. All mugilids have a clear yolk and the early larva has the oil globule in the stern. Carangids have a segmented yolk and the oil globule in the bow of the newly hatched larva. Note, however, that I am not sure this egg has a segmented yolk. On both occasions that it has been seen (A & A1), the yolk appeared clear, at least to a casual glance. Care needs to be taken to confirm when next found.

Larva: The newly hatched larva has the oil globule in the bow, and dark blotches along the notochord (B), which move to the dorsal edge of the notochord in the 2-day old larva (C). There are a few scattered pale chromatophore patched in the finfolds of the posterior half of the early larva, including the caudal finfold (B), but they do not persist in the 2-day larva.

Most mugilid larvae, at the pigmented eye stage (3-5 days post hatch) have some pigment in the dorsal finfold, absent from B above. It remains to be seen whether this is a reliable indicator of this species. The egg has only been recognised twice, once by a barcode from a larva hatched from an egg collected in March 2012, matching 4 adult fish collected locally (BOLD), the other on 28 February 2015. It remains to be seen whether extra vigilance will yield more of these eggs.