Nervous System:
- Made up of ganglion which are connected by a circumoral commissures with the post oesophageal ganglia
Habitat:
- Crayfish live in water, which is classified as an aquatic environment. They are found in oceans and ponds.
- They hide from the predators in the deep ocean water, under rocks and in dark places.
Movement:
- Crayfish have an external skeleton and move by using there swimmerets.
Reproduction:
- Male crayfish attaches sperm underneath females belly. The female then uses her tail to attach the eggs to her swimmerets
Worm:
Nervous System:
- Brain is connected to ventral nerve cord
Habitat:
- live in soil, found sometimes in grass, mud and gardens.
Movement:
- Earthworms move using there cilia and contracting there muscles. They have a hydrostatic skeleton.
Reproduction:
- Hermaphrodites, meaning both male and female - but can't produce with themselves.
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