CRUSTACEANSCRUSTACEANS

Arthropods in Arthropods in the water!the water!

All Arthropods All Arthropods have:have:

1. Exoskeleton1. Exoskeleton2. Jointed Legs2. Jointed Legs

LobstersLobstersShrimpShrimpCrabsCrabsBarnaclesBarnacles

EXAMPLES OF CRUSTACEANS:

CRUSTACEAN INFO…CRUSTACEAN INFO…

Crustaceans have an external Crustaceans have an external skeleton or skeleton or exoskeletonexoskeleton..

Crustaceans have Crustaceans have 4 body parts4 body parts: : eyes, antennas, mouthparts, and eyes, antennas, mouthparts, and swimmerets.swimmerets.

All crustaceans have 4 antennas All crustaceans have 4 antennas (large and small).(large and small).

Like all Like all arthropodsarthropods, they have , they have jointed legs.jointed legs.

CRUSTACEAN CRUSTACEAN CHARACTERISTCSCHARACTERISTCS

Crustaceans have Crustaceans have a fan-shaped tail.a fan-shaped tail.

They do NOT They do NOT have a heart.have a heart.

Crustaceans have Crustaceans have compound eyescompound eyes, , which mean their which mean their 2 eyes are made 2 eyes are made up of many up of many simple eyes.simple eyes.

Crustacean Crustacean NumbersNumbers

Crustaceans first Crustaceans first appeared 600 million appeared 600 million years ago.years ago.

Fossils of over 2,000 Fossils of over 2,000 species have been species have been found.found.

Crustaceans come in Crustaceans come in different sizes and different sizes and shapes that vary shapes that vary from a few inches to from a few inches to 10 feet.10 feet.

There are currently There are currently more than 800 more than 800 families of families of crustaceans and well crustaceans and well over 40,000 species.over 40,000 species.

Some species live on Some species live on land, about 99% land, about 99% spend their lives in spend their lives in all types of water all types of water habitats, such as habitats, such as seas, lakes, and seas, lakes, and rivers.rivers.

LOBSTERSLOBSTERS

COOL LOBSTER COOL LOBSTER FACTSFACTS

Lobsters are Lobsters are cold cold bloodedblooded; their ; their body temp body temp depends on the depends on the temp of the water.temp of the water.

Most Lobsters are Most Lobsters are nocturnalnocturnal..

The biggest lobster The biggest lobster caught weighed caught weighed over 44 pounds.over 44 pounds.

Lobsters may live Lobsters may live to be 100 years to be 100 years old.old.

ANOTHER LOBSTER ANOTHER LOBSTER FACT…FACT…

Lobsters have a most unusual way of Lobsters have a most unusual way of swimming. The tip of the tail can be spread out swimming. The tip of the tail can be spread out to form a paddle. The lobster can flick its tail to form a paddle. The lobster can flick its tail under its body with such force that it shoots under its body with such force that it shoots backward through the water.backward through the water.

CRABSCRABS

INFO ON CRABSINFO ON CRABS Crabs have many senses Crabs have many senses

that help them to find that help them to find

food and stay out of the food and stay out of the

way of enemies. way of enemies.

Would you believe that a Would you believe that a

crab has 3 different sets crab has 3 different sets

of jaws? They help to of jaws? They help to

chomp and crush the chomp and crush the

crab’s food into tiny crab’s food into tiny

pieces that are easy to pieces that are easy to

digest.digest.

All crabs have two pairs All crabs have two pairs

of antennae on their of antennae on their

heads. The long pair heads. The long pair

help the crab to feel its help the crab to feel its

way around the dark. way around the dark.

The short antennae The short antennae

allow the crab to smell allow the crab to smell

and taste the water.and taste the water.

There are about 4,500 There are about 4,500

different kinds of crabs.different kinds of crabs.

Eeeeew!!!! Eeeeew!!!! WEIRD!!!!WEIRD!!!!

Decorator crabs Decorator crabs are experts at are experts at camouflage. camouflage. They cover They cover their shell with their shell with rocks, seaweed, rocks, seaweed, sponges, and sponges, and other sea life.other sea life.

SHRIMPSHRIMP

WANT SOME SHRIMP?WANT SOME SHRIMP?

There are over 2,000 different species of shrimp There are over 2,000 different species of shrimp

worldwide. Shrimp range from a small fraction of an worldwide. Shrimp range from a small fraction of an

inch to 9 inches long. Shrimp are eaten by many inch to 9 inches long. Shrimp are eaten by many

animals, including many fish, birds, octopi, squid, animals, including many fish, birds, octopi, squid,

cuttlefish, and peoplecuttlefish, and people

MORE SHRIMP INFOMORE SHRIMP INFO

Female shrimp lay over 1,000 Female shrimp lay over 1,000 eggs, which are attached to her eggs, which are attached to her swimming legs. The shrimp emerge swimming legs. The shrimp emerge as tiny floating organisms. After as tiny floating organisms. After growing, they sink to the bottom, growing, they sink to the bottom, where they will live. As a shrimp where they will live. As a shrimp grows, it often molts (losing its old grows, it often molts (losing its old shell and growing a new one.)shell and growing a new one.)

Some Shrimp live on anemones and keep them clean in return for protection.

Tadpole Shrimp-Tadpole Shrimp-

BARNACLESBARNACLES

Barnacles are crustaceans that don’t go anywhere. They stick to rocks and other solid objects and stick out their legs to catch food floating by.

BARNACLES ?????BARNACLES ????? Barnacles are Barnacles are

usually found in usually found in warm waters. You warm waters. You can find them can find them attached to ship attached to ship bottoms, wharf bottoms, wharf piles, rocks, whales, piles, rocks, whales, large fish and large fish and shellfish. Since they shellfish. Since they are attached to are attached to rocks, they are rocks, they are dependent on the dependent on the tides to bring food tides to bring food to them.to them.

THAT’S ALL FOLKS!!

By: Nichol Blatnik, Julie Hunt and Marta Howard ~ Degan Elementary

BYE BYE!