Ceratothoa barracuda Martin, Bruce & Nowak, 2015

(Fig. 3 A–D)

Ceratothoa sp. 1 .— Trilles, 1979: 269, pl. 2, fig. 13.

Ceratothoa barracuda Martin, Bruce & Nowak, 2015a: 261, figs. 5–8.

Material examined. 1 ovig. ♀ (19 mm TL; 6 mm W) (UMT Crus 01160), 1 mature ♁ (7 mm TL; 3 mm W) (UMT Crus 01161), St 109, EEZ, 04º 44’ 85” N; 104º 39’ 4518” E, 15 July 2016, from buccal cavity of Sphyraena forsteri, coll. SEAFDEC .

Host. Only known from the family Sphyraenidae: bigeye barracuda Sphyraena forsteri (Cuvier, 1829) (Martin et al. 2015a, present study).

Distribution. Malaysia, Terengganu; northern Australia (Martin et al. 2015a); West Papua (Trilles 1979). Based on the known host association and its distribution, Ceratothoa barracuda may have an Indo-Pacific distribution from East Africa and Southeast Asia to Japan and south of New Caledonia (Froese and Pauly 2022).

Remarks. Ceratothoa barracuda is a new record for Malaysian waters and identified by elongate body; subtriangular cephalon; subacute anterolateral projections on pereonite 1; pleotelson with convex posterior margin; pereopods 5–7 bases with strong carinae and enlarged ischium (Martin et al. 2015a). Most similar to Ceratothoa carinata, but C. carinata with pleotelson posterior margin strongly concave; enlarged ischium and basis only present on pereopod 7; antennula articles distally to article 4 narrower than those of C. barracuda (Martin et al. 2015) .