Haliotis clathrata Reeve, 1846
Distribution: East Africa & offshore islands to American Samoa,
Okinawa to Australia except southern coast. Size to 42mm.
From the shore down to 75m deep.

A specimen from Bantayan island, Cebu, Philippines. 27mm.
2-3m deep, under rocks, Fernão Veloso, Nacala Bay, Nampula, Mozambique.
22-23mm. Syn: H. venusta Adams & Reeve, 1850.
Sculpture made of scaly spiral cords; some of those that run between suture and holes
are more prominent (see near apex); dorsum crossed by wavy folds that never reach the row of holes.
An odd specimen, collected by dive, in Nacala Bay, Mozambique. 35mm.
The sculpture is broader than in average clatrhrata. Is this a form of pustulata?
1-2m deep, under rocks, Bohol island, Philippines, 21mm.
Patterns: prosocline between suture and holes, banded between holes and columella.
Color not very variable: background mainly red, with additional drawings made of two tones.
Green specimens occur in Queensland.
4 more shells from Balabac, Palawan.
Here, variations affect colours; in the circles, the two extreme reds of this lot.
A brown shell from north Bohol, Philippines. 26,6mm. The pattern changes a bit.
The species is sometimes offered under the name H. crebrisculpta Sowerby III, 1914,
a taxon that might be a junior synonym of H. squamosa J.E. Gray, 1826.
Variations in a single place : specimens from Fernão Veloso beach, Nacala Bay, Nampula, Mozambique.
Fished at 15-20m deep. Sizes from 19 to 22mm. The helicoidal pattern is not an absolute law.
East African shells seem smaller, and less flat than in western Pacific populations.
Comparison between tomricei and the elongated caledonian form of clathrata.
H. tomricei: 75m deep, Bohol, Philippines, 13,5mm.
H. clathrata: 8-10m deep, Sainte-Marie island, SW. lagoon of New Caledonia, 26mm.
Both shells were labelled "crebrisculpta".
5-10m deep, by dive, Olango island, Cebu, Philippines.
Beautiful flat and legthened specimen. 28,4mm.
3 specimens from Calituban island, Bohol, Philippines. 29-30mm.
Original pictures: © Franck Frydman.
1- A rounded specimen from Kwajalein. 23mm.
2- A lengthened shell from New Caledonia. 29mm.
3- A specimen from Mactan island, Cebu, Philippines. 30mm.
Original pictures: © Franck Frydman.
Two specimens from Guam, collected at 5m deep, under dead coral, Piti Reef. 18-22mm.
Original pictures: © Franck Frydman.

All pics © Olivier Caro