Chaetognathids Flashcards
1
Q
what traits do Chaetognathids have?
A
- pelagic
- active predators (sit and wait)
- transparent/translucent
- 3 coelomic regions (head, trunk, tail)
- simultaneous hermaphrodites
2
Q
what function does the head serve?
A
- predation
- has 2 pharyngeal jaws (trophi) with spines for grasping (extends and retracts)
- spines impale prey and secrete toxins
3
Q
what function does the trunk serve?
A
- nervous system and digestive system
- straight digestive system
- has a second brain in trunk in addition to head
- lateral fins for propulsion
4
Q
what function does the tail serve?
A
- reproduction
- both male and female gonads
- reciprocal transfer
