13. Endangered: In danger of extinction throughout all or a significant portion
of a species' range.
Diadromous: (used of fish) migratory between fresh and salt waters.
Spawn: To deposit eggs; produce spawn
Gill: The respiratory organ of most aquatic animals that breathe
water to obtain oxygen, consisting of a filamentous
structure of vascular membranes across which dissolved
gases are exchanged.
Shallow: Measuring little from bottom to top or surface;
lacking physical depth
14. Ascension Island: An island in the southern Atlantic northwest of St. Helena.
Discovered by the Portuguese on Ascension Day in 1501,
it was taken by the British in 1815 and has been administered
by St. Helena since 1922.
Hibernate: To be in an inactive or dormant state or period
Hatch: To produce (young) from an egg
Herd : A number of wild animals of one species that remain together
as a group