Transcript Jellyfish- Powerpoint

JELLYFISH
No bones. No brains. But what a
sting!
FACTS ON JELLYFISH

Belong to the Phylum
“Cnidaria”
 Radial Symmetry
 Medusa shape
 Fertilize externally
-sperm & egg
released in water

2 Layers
-epidermis -outer
- gastrodermis -inner
mesoglea -jelly between
the layers
 Stinging cells called
“ cnidocytes”.
Habitat

Jellyfish are found in
every ocean. They
live in both deep and
shallow coastal
waters.
Feeding

Jellyfish eat tiny plankton,
invertebrates, larvae, and
small fish. Jellyfish have
sensors in their tentacles
that can detect movement
around them. When
movement is detected,
stingers shoot out and
paralyze the prey. The
jellyfish then uses its
tentacles to bring the prey
to its mouth and ingest it.
Movement
 Jellyfish
usually drift or move gracefully
through the ocean, occasionally you will
see them swimming. Jellyfish swim by
pulsations of their umbrella or bell shape.
It is coordinated by a very simple nervous
system.
Appearance


Jellyfish often appear
clear or pale blue color.
But they can also be
yellow, deep blue, bright
purple, pale lilac, bright
orange, deep red.
When they are disturbed
at night, they give off a
cold bright light called
luminescence.
More Facts




Made up of 95% water
more than 200 species of
jellyfish
Jellyfish have a short
lifespan, the longest
surviving species living
only two to six months
ocean sunfish and
leatherback turtles are
two of the jellyfish
predators
LIFE CYCLE