Endosymbioses
of
Algae -
Endosymbiotic
algae
have
been
recorded
in
more
than
100
genera
of
aquatic
invertebrates,
particularly
in
the
coelenterates
(jellyfish,
corals,
sea
anemones,
hydra),
the
platyhelminths
(flastworms,
principally
the
planarians),
the
porifera
(sponges)
and
the
molluscs
(clams,
squid).
They
are
often
found
in
the
cytoplasm
of
cells
concerned
with
digestion,
as
in
the
amoebocytes
of
sponges
or
the
phagocytic
blood
cells
of
some
clams.





