Acanthurus bahianus Castelnau, 1855

Triay-Portella, Raül, Pajuelo, José G., Manent, Pablo, Espino, Fernando, Ruiz-Díaz, Raquel, Lorenzo, José M. & González, José A., 2015, New records of non-indigenous fishes (Perciformes and Tetraodontiformes) from the Canary Islands (north-eastern Atlantic), Cybium 39 (3), pp. 163-174 : 168

Acanthurus bahianus Castelnau, 1855 , ocean surgeon

Material examined. – MMF 44367, one resting female, 168 mm TL, 131 mm SL, El Altillo, 28°11’N 15°33’W, 4 m, 8 Aug. 2014, reef platform ( Fig. 2G ).

Sightings and catches. – Once, n = 1, same locality ( Fig. 3 ).

Remarks. – A tropical reef-associated species ( Robins and Ray, 1986), living from 2 ( Baensch and Debelius, 1997) to 40 m of depth ( Desoutter, 1990), usually at 2-25 m, between 21 and 25°C ( Baensch and Debelius, 1997). Inhabits shallow bottoms with coral or rocky formations ( Cervigón, 1994). Usually occurs in groups of five or more individuals. Mainly diurnal. Feeds on algae ( Robins and Ray, 1986). Maximum length published is 381 mm SL ( Humann, 1994). An amphi-Atlantic species. West Atlantic: Massachusetts, USA and Bermuda southward to southern Brazil ( Froese and Pauly, 2015, Anderson et al., 2015). In the mid-Atlantic: Ascension ( Cadenat and Marchal, 1963; Wirtz et al., 2014) and St. Helena Islands ( Desoutter, 1990). East Atlantic: off Angola ( Smith, 1997).

This is the first record for A. bahianus from the Canary Islands.

Figures

Figure 2. - Non-native species introduced to the Canaries. A: Holocentrus adscensionis; B: Cephalopholis taeniops; C: Paranthias furcifer; D: Prognathodes marcellae; E: Abudefduf saxatilis; F: Abudefduf hoefleri; G: Acanthurus bahianus; H: Acanthurus coeruleus; I: Acanthurus chirurgus; J: Acanthurus monroviae; K: Cantherhines pullus. Scale bars = 5 cm.

Figure 3. - Collection locations for the new records from the Canaries. 1: Holocentrus adscensionis, 2: Cephalopholis taeniops, 3: Paranthias furcifer, 4: Prognathodes marcellae, 5: Abudefduf saxatilis, 6: Abudefduf hoefleri, 7: Acanthurus bahianus, 8: Acanthurus coeru- leus, 9: Acanthurus chirurgus, 10: Acanthurus monroviae, 11: Cantherhines pullus.