Invertebrates

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Across
  1. 2. Hard bodied marine organisms which have small holes in their body to allow water to filter through
  2. 3. Colonial organisms made up of polyps and algae, they make their body from calcium carbonate
  3. 5. Have 6 legs, bodies segmented into 3 parts, and a hard exoskeleton
  4. 7. has 8 legs, a hard exoskeleton, are predatory and have limbs powered by hydraulics
  5. 8. Soft bodied marine organisms which possess long tentacles
Down
  1. 1. Have a thick exoskeleton, bodies segmented into 3 parts, and usually have a pair of large pincers
  2. 2. has a single foot, a spiral shell and eats plants
  3. 4. has 8 arms, a soft body, a beak and are very intelligent
  4. 6. has no limbs, a tube like body and lives underground