How do arrow worms adapt to environment?
How do arrow worms adapt to environment? Arrow worms that live in surface waters, such as Sagitta enflata, are often transparent, which helps them avoid predators such as fishes. Species from deeper waters, such as Sagitta planctonis, are more muscular and less transparent. The mid-water species usually perform diurnal vertical migration. How do chaetognaths move? […]