Maximum sustainable harvest
The greatest quantity of a population of fish or invertebrates,
such as lobster, that can be taken
each year and yet totally replace itself through natural
reproduction of the species.

Mytilus
Mussel

Macroplankton
The larger members of the plankton, such as jelltfish.

Meroplankton
Those planktonic organisms which are planktonic forms only
during their larval stages.

Metamerphosis
Change in form, structure or function-physical transformation
more or less sudden-development
after the emdryonic state-as from tadpole to frog.

Microplankton
Plankton that can be collected in standard plankton nets.

Macrocystis
One of the largest algaes. Can be over 100 feet.

Mesenchyme
A nonliving gelatinous substance found be tween the layers of
cells which adds thickness
and form.

Mesoglea
A clsar, noncellular substance found between the epidermis and
the gastrodermis in some coelenterates.

Mesoglea
A clsar, noncellular substance found between the epidermis and
the gastrodermis in some coelenterates.

Mitosis
Process of producing diploid or somatic cells.

Mesopelagic zone
The zone from 200 meters to 1,000 meters deep.

Macoma
Territorial benthic bivalve.

Myxophyceans
Common algae found at the zone level.