How to Identify Blue Hamlet

To identify Blue Hamlet (Hypoplectrus gemma), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

The entire body, including fins, is a brilliant, iridescent electric blue. There are no distinct markings, bands, or spots, which distinguishes it from most other hamlets. The intensity of the blue can vary slightly with light and the fish's mood.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Uniform, brilliant iridescent blue coloration over the entire body and fins., Absence of any other markings, bands, or spots., Relatively deep body compared to its length.

Dorsal fin

Single dorsal fin with 10 spines and 10-11 soft rays. The spiny portion is continuous with the soft-rayed portion.

Tail fin

Caudal fin is emarginate (slightly forked) to truncate.

Pectoral fin

Pectoral fins are clear and relatively small.

Distinctive fins

All fins are uniformly blue, matching the body coloration.

Identification Tips

1. 1

   Coloration

   The most definitive feature is its uniform, brilliant electric blue color across the entire body and all fins, without any other patterns or markings.

2. 2

   Absence of Markings

   Unlike most other hamlets, the Blue Hamlet lacks any stripes, spots, or bands.

3. 3

   Geographic Range

   Its restricted distribution to Florida and nearby waters can aid in identification, especially when distinguishing from similar-looking species found elsewhere.

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