How to Identify Rubberlip grunt

To identify Rubberlip grunt (Plectorhinchus mediterraneus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Adults are typically silvery-grey to brownish, often with a darker dorsal side fading to a lighter belly. Juveniles exhibit distinct dark spots or longitudinal stripes that fade with age. The fins are generally dusky or yellowish.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Thick, fleshy lips, giving it the 'rubberlip' moniker., Large eyes., Robust, compressed body., Small scales., Absence of a notch in the dorsal fin.

Dorsal fin

Single dorsal fin with 12-14 spines and 17-20 soft rays. No deep notch between spiny and soft parts.

Tail fin

Slightly forked caudal fin.

Pectoral fin

Relatively long pectoral fins.

Distinctive fins

Anal fin with 3 spines and 7-9 soft rays. Pelvic fins thoracic.

Identification Tips

1. 1

   Lips

   The most distinguishing feature is its thick, fleshy, rubbery lips, which are noticeably larger than those of most other grunt species.

2. 2

   Coloration (Juveniles vs. Adults)

   Juveniles have prominent dark spots or stripes that are absent or greatly reduced in adults. Adults are more uniformly silvery-grey to brownish.

3. 3

   Dorsal Fin

   The dorsal fin is continuous, without a deep notch separating the spiny and soft-rayed portions, which can differentiate it from some other grunt species.

4. 4

   Body Shape

   Its robust, compressed body is characteristic of the Plectorhinchus genus.

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