At low tide, areas that are more often covered in water may be exposed
for a short time. Here, you might see a greater variety of plants
and animals. Some animals, in fact, function best during this window
of low tide. These include fiddler
bubbler crabs and soldier
crabs. Other less hardy animals simply hunker down and wait
until the tide comes back in. Many hide under the sand, in holes
and crevices of rocks and coral rubble, or shelter in pools.
At very low spring tides, even more areas are exposed. These areas
are almost always covered with water and are thus richer in marine
life that do not tolerate being exposed out of water for long. Most
of the bigger and mobile animals would have moved into deeper waters.
But plants and immobile animals such as corals, sponges and large
sea anemones may be seen. In places where pools of water collect,
even more animals may be seen taking shelter.
spectrum of life: The different shore ecosystems are
found in different zones: such as mangroves, seagrasses, sandy shores,
rocky shores and corals reefs. The boundaries of each ecosystem
are not clearly marked. Overlaps occur as one ecosystem gradually
changes into adjoining ecosystems. The ecosystems impact one another
and a shore with many different ecosystems tends to be richer in
Many marine creatures spend different parts of their lifecycle in
different ecosystems. For example, our favourite seafood such as
shrimps and fishes may grow up in the safety of mangroves or seagrasses,
before venturing out into the reefs as adults. They may return to
the 'nursery' of mangroves and seagrasses to lay their eggs.