Other
Tarantula
Hissing
cockroach
Vinegar eel
Rotifer
Planarian
Millipede
Scorpion
Hydra
Sea star
Snails
Symmetry
Bilateral
Bilateral
Bilateral
Bilateral
Bilateral
Bilateral
Bilateral
Radial
Radial
Bilateral
Skeleton
Exo-
Exo-
Hydrostatic
Hydrostatic;
(also maybe
exo- cuticle)
Hydrostatic
Exo-
Exo-
Hydrostatic-
Endo-
Exo-
Appendages
Eight
Six
None
None
None
2 per segment
Eight
None
Five
None
Cephalization
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Habitat
Terrestrial
Terrestrial
Aquatic
Aquatic
Aquatic
Terrestrial
Terrestrial
Aquatic
Aquatic
Both
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