What type of body symmetry does hydrozoa have?
Does the organism have a skeleton? Also what type of skeleton?
Does the organism have a sefmented or unsegmented body plan?
What type of digestive cavity does it have? Tube or Sac?
Does it have any appendages? Are they paired and/ or jointed?
How does the organism recieve oxygen?
What does it use to gather sensory data?
Mobility?
Body Movement?
Food intake?
Reaction to touch?
Additional observations. What other characteristics are unique for their organism?