Order Anthomedusae

• Gymnoblastic - skeleton likes Hydrotecha unlike Obelia.
•  Few species have Calcareous Exoskeleton like in Stylaster
• Hydras are freshwater
• Most abundant in bays and shallow coastal waters.
• Hydra viridis - have Endosymbiotic relationship with Chlorella.
• Identify the parts being pointed at:

  A - Mouth

  B - Hypostome

  C - Gastrovascular Cavity

  E - Mesoglea

  F - Gastrodermis

  
• Gastrodermis

  • has enzymatic gland cells
• Mesoglea

  • non-cellular and jelly-like in polyps but thickens in medusa
• Hypostome

  • where tentacles are located
• Identify the species:

  Hydra viridis

  
• Identify the species:

  Chlorohydra viridissima

  
• Identify the species:

  Stylaster sp.

  
• Identify the species:

  Bougainvillia sp.

  
• Phylum: Cnidaria

  Class: Hydrozoa

  Subclass: Hydroidolina

  Order: Anthoathecata

  Suborder: Filifera 

  Family: Bougainvillidae

  
• Phylum: Cnidaria

  Class: Hydrozoa

  Subclass: Hydroidolina

  Suborder: Filifera

  Order: Anthoathecata

  Family: Stylasteridae

  
• Phylum: Cnidaria

  Class: Hydrozoa

  Subclass: Hydroidolina

  Order: Anthoathecata

  Suborder: Capitata

  Family: Hydridae