Species Profile
Echinus
Sea urchin
KingdomAnimalia
PhylumEchinodermata
ClassEchinoidea
OrderUnknown
FamilyUnknown
Introduction
Echinus inhabits rocky sea bottoms.
It feeds mainly on algae.
It is slow moving.
Size & Structure
01
Globular body
02
Long movable spines
03
Hard calcareous test
Echinus — 3D Model
General Features
- Coelom
- Reduced
- Body plan
- Tube within a tube body plan
- Germ layer
- Triploblastic
- Metamerism
- Absent
- Body symmetry
- Radial
- Fertilization
- External
- Digestion type
- Complete
- Nervous system
- Nerve ring with radial nerves
- Excretory organ
- Absent
- Body temperature
- Poikilothermic
- Circulatory type
- Type-I (absent)
- Development type
- Indirect
- Respiratory type
- Tube feet and gills
- Mode of excretion
- Ammonotelism
- Circulation system
- Water vascular system
- Skeleton structure
- Endoskeleton
- Level of Organisation
- Organ-system level
- Regulation of Osmosis
- Osmoconformer
Ecology
Grazer on algae
Controls algal growth
Part of marine food chain
Economic Importance
Used in marine studies
Ecological importance