Do crayfish have good eyesight?

Chef's answer
These crustaceans have good eyesight and, like other related species (lobsters, prawns), they can move their eyes independently from one another and without moving their body. Crayfish molt at the end of June. ... Crayfish are most active at night.
Frequently asked Questions 🎓
Crayfish will drown if they are kept in water that is significantly over their head for 3-6 hours without supplemental oxygenation. This makes air bubblers mandatory, and long bubble walls are the best. Filter oxygenation is not enough, because filters fail way more often than air pumps.
Crawfish, crayfish, and crawdads are the same animal. Which term you use may depend much on where you live. Louisianans most often say crawfish, whereas Northerners are more likely to say crayfish. People from the West Coast or Arkansas, Oklahoma, and Kansas often use the term crawdad.
20 to 30 yearsAdult size is reached by crayfish in the wild in about 4 years. They can live from 20 to 30 years.
A little known fact about crayfish is that they can produce sound in and out of the water. Crayfish produce sounds through their scaphognathite, which is a thin appendage that draws water through the gill cavity. They move the scaphognathite and produce sound and air bubbles.23 May 2017
To boil: Keep the cray in salted boiling water for about 10-12 minutes or until their shells turn a bright orange colour. Put in cold water immediately afterwards to arrest the cooking process. To grill: Cut the cray in half lengthwise, baste with a delicate marinade and grill flesh-side up until flesh turns opaque.
Procedure: chilling in air
  • Place the crustaceans in a freezer. Regularly check them for signs of insensibility (see 'Signs of insensibility'). ...
  • Once the crustaceans are showing signs of insensibility, mechanically kill them as soon as possible to ensure that they do not recover.
  • 18 Dec 2020
    Larger crawfish stressed by low dissolved oxygen climb to the surface on vegetation or traps and expose their gills to higher oxygen levels at the surface (Figure 5). ... When oxygen levels become critically low, crawfish attempt to access the water surface, or may even leave the pond.7 Mar 2010
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