Neap tides
Neap  trdes occur between spring tides and have a small
range between high and low tipe.
 
Neritic zone
The shallow seas with cover the continental shelves of the
world

Nekton
Swimming pelagic organisms.

Neritic region
the area (water) over the continental shelf.

Nsnoplankton
Larger than ultraplankton, but too small to  be caught in nets
of the finest mesh.

Nematocysts
Stiging capsules used by most Cnidoria for protection and
securing food.

Nudibranchs
A group of mollusks with no shell and their gills exposed.

Nitochondria
Produce enzymes to convert food to energy.

Nucleus
A membrane separated part of a eukaryotic cell containing the
chromosomes and the nucleolus.
Generally the most prominent feature in the cell.

Neopilina
Mollusk thought to have extinct.