Chaetognatha

Question 1

adaptive zone

Answer 1

marine active swimmers (have fins)
predators
most open ocean

Question 2

developmental features

Answer 2

• radial cleavage
• ciliary photoreceptors
• deuterostomes

BUT are not phylogeneticallly related to other deuterostomes! meaning deuterostomes are not monophyletic

Question 3

misc. idk
- predation
- repro.

Answer 3

Chaetognaths are hunters

• spines, teeth
• important role in pelagic food chains

Complex mating dances