1. Competition
Sea sponges and other sessile organisms
compete fiercely with each other for space
using physical and chemical warfare. sponges
that evolved anti-sponge toxins, were often
victorious over non-toxic varieties. Thus, most
sponges living today produce potent toxins,
which provide a secondary benefit of
discouraging all but the most highly adapted
predators, such as the sea slugs.

2. Predation
A predator- prey example in a coral
reef is the one with the tiger shark and
Green Sea Turtle. The tiger sharks
detect prey using their finely tuned
senses. Also, rows of razor-sharp teeth
and powerful jaws allow them to crack
the thick caparace (shell) of the prey,
the sea turtles. The sea turtle uses its
shell for defense against predators.
But some, like the Tiger shark, are
powerful enough to kill the turtle.

3. Parasitic
• An example of this
symbiotic relationship
Isopod is the Fish Doctor and
attached to fish. The Fish Doctor,
fish.
a type of isopod
crustacean, will attach
itself under the fins,
scales, or gills of a
fish. It then sucks the
blood of the host fish
until it dies.

4. Mutualism
This relationship exists between
Hermatypic corals and zooxanthellae or
coral polyps. The zooxanthellae live inside
the Hermatypic corals tissue. They
consume the waste products of the coral
and turn the waste into substances
usable by the coral for growth and
maintenance. It is certain death for the
coral if there is an absence of the
zooxanthellae for too long.

5. Commensalism
• A good example of commensalism is
between the Imperial Shrimp and large
sea cucumbers. The Imperial Shrimp
will ride on the sea cucumbers,
receiving transportation. The sea
cucumber helps as a transporter to
food sources. The imperial shrimp is
able to ride on the sea cucumber,
getting exposed to larger areas with
more potential food sources while
using less energy.