Ocean animals are adapted to life in what zone

Well, there are three different zones:
sunlight zone: the brightest; plants and algae can grow there, home to many ocean animals, and shallowest of zones

twilight zones: dimmer and colder water; plants an algae can not liver there; ocean animals that liver here live in darkness and many have big eyes

then there is the midnight zone: super cold and pitch black, food is scarce and few ocean animals liver there.

my best answer would be the sunlight zone...

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.