AMSTI: Fiddler Crabs

Arthropods have three main body parts. What are they?

• head, legs, stomach

• head, thorax, legs

• head, thorax, abdomen

• head, legs, chest

A fiddler crab is a crustacean. Crustaceans are invertebrates which means they have ________.

• a backbone
• no backbone
• a head
• a headache

A fiddler crab is an arachnid.

• true
• false

Fiddler crabs molt as they grow. This means _______________.

• They grow new legs and grow new ones.
• They shed their tail and grow a new one.
• They shed their eyes and grow new ones.
• They shed their shell and grow a new one.

A fiddler crab's babies are born ___________________.

• from eggs
• live
• from the ocean
• from the beach

Fiddler crabs are arthropods. What are arthropods?

• animals with no legs and segmented body
• animals with 8 legs
• animals with jointed legs, an exoskeleton, and a segmented body
• animals with 2 legs and a thorax

Fiddler crabs have an endoskeleton.

• True
• False

If you see a male fiddler crab waving his major claw, he is trying to _______________________.

• find something to eat
• attract a female
• fight with another male
• saying hello

Fiddler crabs breathe with ______________.

• lungs
• gills
• lungs and gills
• they don't breathe

A fiddler crabs gills must be ___________ when they are not in the water so they can breathe.

• dry
• hot
• cold
• moist