Bigeye Tooth (Dentex macrophthalmus)

Classification and Conservation Status

The bigeye tooth (Dentex macrophthalmus) is a species of fish that is not considered endangered, according to the classification by D. E. Wilson and D. M. Reeder.

Distribution and Habitat

This species is endemic to Madagascar, with a distribution range that spans from shallow to deep waters. Specifically, it has been found at depths ranging from 24 to 410 meters, with water temperatures between 13.2°C and 17.6°C, and salinity levels of approximately 35.3.

Morphology

The bigeye tooth has an oval and compressed body shape, with a regularly inclined head profile. Its most distinctive feature is its large eyes, which have a diameter greater than the length of the muzzle. The suborbital space is very narrow, and the posterior narine is rounded. The cheeks are scaly, as are the pre-opercule, except for the posterior edge. The mouth is low and inclined.

Dental Structure

The bigeye tooth has several rows of caniniform teeth, with the outer row being the strongest. At the upper jaw, there are four highly developed anterior teeth that are visible when the mouth is closed. In contrast, the lower jaw has ten small anterior canines that are much less strong than those on the upper jaw.

Gill Rakers and Fins

The bigeye tooth has 17 to 20 lower gill rakers and 9 to 12 higher ones on the first gill arch. Its dorsal fin features 11 or 12 thorns of increasing length, followed by four or five subequal thorns, and finally ten or eleven soft rays. The anal fin has three thorns and eight soft rays.

Scales

The bigeye tooth has side line scales ranging from 49 to 55.

Vernacular Names

This species is also known as the Large-eye dentex in English and Cachucho in Spanish.

Sources:

* Wilson, D. E., & Reeder, D. M. (eds.).
* [External links]