Crustaceans

Crustaceans are in: sea

Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea

Definition: a Crustacean is a mostly aquatic group of arthropods of the class Crustacea including lobsters, crabs, shrimps and barnacles. They characteristically have a segmented body, an exoskeleton and paired jointed limbs. Like all arthropods, crustaceans have a hard external skeleton (exoskeleton). They have two pairs of antennae, a pair of mandibles, two pairs of maxillae (mouth parts used for eating) on their heads, a pair of appendages on each body segment (head, thorax, and abdomen) and a pair of compound eyes (usually on stalks).
Live-lobster(1).jpg
9 Facts About Crustaceans:
1) The largest kind of Crustacean is the Giant Spider Crab found in the waters of Japan. It measures up to 12 feet (3.7 metres) across its outstretched claws.
2) The smallest Crustaceans such as water fleas can be smaller than 1/125 of an inch (0.2mm) long.
3) All Crustaceans have an exoskeleton which cannot grow so it must be moulted for the next to grow.
4) There are 44,000 different species of Crustaceans. Most of them live in the sea (marine) but some of them live in freshwater while others live on land.
5) The most well-known Crustaceans are Decapods. Decapods have ten legs, and species from this group include Lobsters, Prawns, Crabs and Crayfish
6) Live lobsters can be yellow, blue, orange, red (not usually, probably pigment displacement) and white, but almost never red (see before).they actually only turn red when they have been cooked!
7) Male fiddler crabs have one large claw which they wave in the air to impress females when trying to find a mate and to intimidate other males and predators. The waving of their claw is thought to resemble playing the fiddle (violin).
8) Lobsters have the ability to regenerate body parts (claws, legs, etc.) which they lose.
9) Some species are active predators, some are filter-feeders and others are scavengers. They may be free-living, sessile or even parasitic. Woodlice are the most terrestrial of the crustaceans. Although they tend to live in damp places, some species can survive in deserts. A number of crab species are semi-amphibious, returning to water only to breed.

these are the sub-divisions of crustacea.

Crabs:

Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Brachyura

Lobsters:

Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Astacidea
Family: Nephropidae

Shrimp:

Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Caridea

By Matthew Hills, Bethany Leake, Nicola Purslow, James Stillman and Cian McAuley

crustaceans are things that lives underwater e.g lobster shrimp and many more….

Questions

Q1: What is the name for the study of crustaceans?

Q2: Are all crustacenans entirely aquatic-dwelling creatures?

Q3: What happens when lobsters moult?

Q4: What term describes the eating habits of a crab?

Q5: All crustaceans are hermaphroditic. True or False?

Q6: Officially, how many feet do claw lobsterS have?

Q7: Crabs are rarely aggressive. True or False?

Q8: Which crustacean can attain the greatest weight?

Q9: Which of these is typically a fresh water crustaceans?

Answers

1A: Carcinology

2A: No

3A: They grow a new shell

4A: Omnivore

5A: False

6A: 10

7A: False

8A: Lobster

9A: Crayfish

by bethany&jordan&nicole&milan&georgia!!

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