Nekton- the swimmers

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Nekton- the swimmers
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Three Different Types of Nekton

• Chordates- Chordates are the largest group of
  nektons and have bony cartilage. This group
  includes bony fish, whales, sharks, turtles,
  dolphins, marine reptiles, marine birds, and
  seals.
• Mollusks- Nektons that include animals like squid
  and octopus.
• Arthropods- Nektons that include animals like
  shrimp, which are mostly bottom dwelling animals.

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Fish

• Have bony skeletons
• Benthic- those that live near the bottom
• Pelagic- those that have no connection to the
  bottom

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Bony Fish

• Examples

Gopher Rockfish
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Black And Yellow Rockfish
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Blenny
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Clownfish
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Puffer Fish Hydrocynus vittatus
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Flounder
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Abyssal Types
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Angler fish
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Sharks and Rays
have skeletons made of cartilage
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Zebra shark
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Marine Mammals

• Regulate their body temperature
• Feed their young milk
• Have fur at some time during their life history

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Marine Reptiles

• Dont regulate their internal temperature
• Lay eggs on land

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Marine Birds
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All About Marine Birds

• Marine birds do not get wet when they enter the
  water. A preening gland secretes waxes and fats
  that a bird spreads throughout its feathers in
  order to make itself waterproof/insulated.
• Many marine birds have salt glands, which
  concentrate salt from blood in an area near the
  sinuses. The bird then can rid itself of excess
  salt by "sneezing" the salt out.
• The majority of the fresh water that marine birds
  need comes from their prey.

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Molluscs
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All About Molluscs

• Very soft-bodied invertebrates (no spine)
• Some of the most well-known mollusks (like the
  octopus, for example) have no shells at all
• Many mollusks have a muscular foot that they use
  for motion.

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Arthropods
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All About Arthropods

• The Subphylum Crustacea has about 50,000 species
  of lobsters, crabs, shrimp, barnacles, brine
  shrimp and others.
• Anthropods have a segmented body, and an
  exoskeleton.