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Crustaceans

Usually considered as a subphylum, Crustaceans comprise a group of arthropods including crabs, crayfish, lobsters and shrimp. Most crustaceans are aquatic animals, though some are terrestrial, parasitic and barnacles. Crustaceans have a chitinous exoskeleton, segmented body, and paired jointed limbs.

1,209 Questions

What mineral are crustaceans teeth made of?

Crustaceans' teeth are primarily made of a hard mineral called calcium carbonate. This mineral is often found in the form of calcite or aragonite, which provides strength and rigidity to their feeding structures. Additionally, some crustaceans may have teeth composed of chitin, a flexible organic compound that contributes to the overall structure and function of their mandibles. Together, these materials allow crustaceans to effectively process their food.

Why do sponges stay only in one spot?

Sponges only stay in one spot because they are sessile. Sessile means that they are attached to a substrate and cannot move.

Hope this helps!

How strong is a crayfish's cheliped?

2.481 N according to my force transducer.

How do crayfish breath?

hi, yea they are right they do breathe with gills. but its a little more complicated than than lol

Class Malacostraca Order Decopoda

Being largely aquatic, most larger crustaceans breathe via gills. Their gas exchange system is closed (cf. the open system of insects), and the oxygen that diffuses through the gills is either transported in simple solution in the haemolymph, or bound to blood pigments such as haemoglobin or haemocyanin.

Crayfish gills are located between the carapace (the exoskeleton of the cephalothorax) and the lateral body wall, in the branchial chamber.

Oxygen and carbon dioxide are exchanged between the blood and water across the gill surface as water is circulated through the branchial chamber by the beating of the gill bailer on the second maxilla.

What is a baby prawn called?

An alien ship arrived over Johannesburg, South Africa more than twenty years ago. Discovered aboard the ship were numerous malnourished alien-beings referred to as Prawns, due to their Prawn-like appearance (racism has never been particularly inventive). With the world's eyes on the South African government, the mostly-peaceful aliens were segregated from the human population and held in an area designated District 9. When these alien procreate they produce what is known as a "baby prawn".

There are few pictures of baby prawns available on the internet but you can refer to this picture of an adult, just picture it smaller: http://cache.gawker.com/assets/stills/districtnineplot_io9.flv.jpg

How much do yabbies cost in the pestore in Australia?

it depends on wat size they are i got mine at about 10cm for $2 each

Limb used for walking?

Legs are the limbs used for walking.

Do hindus eat prawns?

Hindu dietary practices vary widely based on regional, cultural, and personal beliefs. Some Hindus are vegetarians and avoid eating all forms of meat, including prawns, while others may consume seafood, including prawns, especially in coastal regions where it is culturally accepted. Ultimately, whether Hindus eat prawns depends on individual choices and interpretations of dietary laws.

Where are the maxillipeds on a crayfish located?

The maxillipeds are the little arm like extentions from the mouth that help hold food when eating.

How much space does a crab need?

1-4 crabs need a 10-gallon tank and 5-8 need a 20-gallon tank and 9-12 need a 25-gallon tank

thanks,mickey

How big are krill and how many does it take to feed a whale?

The krill I have seen were reddish orange in colour, about 30 mm long, and en route to the Antarctic, the ocean around us was quite coloured. A bucket just lowered over the side produced a layer of krill about 20 mm deep at the bottom.

These shrimp like animals are a very important part of the food chain, living on phyto plankton and other tiny creatures, and in turn providing a food source for whales, seagulls, and penguins.

They are (wastefully) harvested as fertilizer.