Properties
1) pore bearers
2) commonly ka sponges
Habitat
All are aquatic
Mostly marine
Few fresh water
Loo
Cellular grade
BP
Cellular aggregation
GL
No
Coelom
Acoelomate
Symmetry
Mostly asymmetric
Metamerism
Notochord
No
No
DS
No. Intracellular digestion. Food goes inside the cell where it is digested
RS
CS
ES
No
No
No
Reproduction
Bisexual/ hermaphrodite/ monoecious
Sexes not separate, male and female found within same animal. Both sexual as well as asexual reproduction (by fragmentation)
Fertilization
Internal
Development
Indirect development through larval stage
Special property
WATER CANAL SYSTEM
characteristic feature of sponges that enables digestion, respiration, excretion and reproduction
Flow of water = ostia-) spongocoel-) osculum
Supporting structure ka spicules (calcium or silicon) and sponging fiber (protein) endoskeleton
EXAMPLES
Sycon (scypha)
Euspongia (common bath sponge)
Spongilla (fresh water spnge)
