Signal crayfish. Signal crayfish (Pacifastacus leniusculus) are an invasive species that have been introduced from the USA into Europe and Japan. They are typically 6-9 centimetres in length, and have robust, smooth claws. They are omnivores and consume mostly detritus. This signal crayfish was photographed in the Buskin River watershed, Kodiak Island, Alaska, USA, in July 2017. Signal crayfish are not native to Alaska, but the population there was discovered in 2001 and is now well established and breeding. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / USFWS / Lisa Hupp |
Bildgröße: | 5838 px × 3503 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |