Its gills.
A koura is a term used in New Zealand for freshwater crayfish. They are native to rivers and streams in the country and are an important part of the ecosystem. Koura are also known as freshwater crayfish or crayfish in other parts of the world.
A rostrum on a crayfish is an extension of its shell. This part is used for extra protection.
The gills- pretty sure
They can eat it or sell them to make profits!!
The anterior part of a crayfish is called the rostrum because it is a structure that protrudes from the head resembling a beak or snout, much like a rostrum on a ship. It helps the crayfish with sensory perception and sometimes functions in defense or capturing prey.
its gills
The rostrum on a crayfish is a hard beak extending from the head that is used for protection.
3, go to this web page for a fantastic explanation: www.science.mcmaster.ca/.../CRAYFISH/CRAYFISH.HTM
Yes, pregnant crayfish can eat algae as part of their diet. Algae can provide essential nutrients for the crayfish and help support their overall health, especially during pregnancy when they may have increased nutritional needs. However, it is important to provide a balanced diet with a variety of food sources to ensure the crayfish receives all the necessary nutrients for a healthy pregnancy.
Nephridiopores in crayfish are part of their excretory system (for removing nitrogenous waste); crayfish propel water from the rear to the front and out the nephridiopores. It is analogous to how humans have to expend their liquid waste.
Decapod