What is it?
give birth to a baby
What is it?
feather
What is it?
stinging cell
What is it?
fin
What is it?
skull
What is it?
feed milk
What is it?
fur
What is it?
spiny skin
What is it?
crawl
What is it?
tentacle
What is it?
gill
What is it?
scale
What is it?
lay egg
What is it?
backbone or spine
What is it?
shell