Come identificare Mosquitofish

Per identificare Mosquitofish (Gambusia affinis/holbrooki), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

torpedo

Colorazione

Generally dull grey to olive-brown dorsally, fading to silvery-white ventrally. Females often have a prominent dark gravid spot near the anal fin. Some individuals may exhibit iridescent flecks or faint vertical bars, especially males during breeding.

Tipo di squame

cycloid

Posizione della bocca

superior

Caratteristiche distintive

Small size (females up to 7 cm, males up to 4 cm), Superior mouth (upturned), Rounded caudal fin, Males possess a prominent gonopodium (modified anal fin for reproduction), Gravid spot in females

Pinna dorsale

Single, short-based dorsal fin located far back on the body, typically with 6-9 rays.

Pinna caudale

Rounded caudal fin.

Pinna pettorale

Small, rounded pectoral fins.

Pinne distintive

Anal fin of males is modified into a pointed, elongated gonopodium for internal fertilization. Females have a fan-shaped anal fin.

Consigli per l'identificazione

1. 1

   Size and Shape

   Small, robust fish; females are larger and more robust than males. Males are slender with a distinct gonopodium.

2. 2

   Mouth Position

   Upturned mouth, indicating a surface feeder.

3. 3

   Coloration

   Dull grey-olive to silvery, often with a dark gravid spot on females.

4. 4

   Fin Morphology

   Males have a pointed, elongated gonopodium (modified anal fin). Females have a fan-shaped anal fin.

5. 5

   Behavior

   Often observed swimming near the water surface.

Esplora Mosquitofish