### animal | vertebrate | fish:

Stickleback
* Most sticklebacks live in ponds.
* Some sticklebacks have active thyroids
  - bones
  - genetics
  - pelvic bones
  - spines
* Some sticklebacks have strong bones
  - inhabit lakes
  - live in lakes
* Some sticklebacks reach maturity
  - sexual maturity
  - survive winter.
  * have strong separated spines in the dorsal fin. All species show similar mating behaviour, with co-operation between the sexes, and protection of the eggs. The males construct a nest from vegetation held together by secretions from their kidneys. The males then attract females to the nest. The females lay their eggs inside, where the males fertilise them. The males then guards the eggs until they hatch
* are a dietary mainstay for many fish and birds
  - bottom-feeders that mainly eat tiny crustaceans
  - carnivorous, feeding on small animals such as insects, crustaceans and fish larvae
  - found in North America and northern Eurasia
  - noted for their highly ritualized reproductive behaviour
  - one of the most scientifically studied non-game fishes
  - single species of fish with a diversity of forms
  - small, scaleless fish with spines along their back in front of their dorsal fin
* bony fish
* breathe using gills.
* eat small crustaceans and fish.
* have air
  - appearances
  - distinct and well-studied reproductive behaviors
  - chests
  - fishbones
  - skulls
  - vacuoles
* make up five genera, most of which have just one species.
* obtain oxygen through countercurrent exchange in the gills.
* provide a good example of male dominance in mating and nesting behavior.
* utilize countercurrent exchange in their gills to increase their blood oxygen supply.

Stickleback fish
* Most stickleback fish have hearts
  - senses
* Most stickleback fish live in environments
  - salt water

### animal | vertebrate | fish | stickleback:

Female stickleback
* prefer to spawn with males whose nests contain eggs.
* use male coloration in mate choice and hence avoid parasitized males.

Fourspine stickleback
* are found throughout the Bay year-round.
* move to deeper channels in winter.

Male stickleback
* build elaborate, golf ball-sized nests.
* produce a special enzyme in their kidneys that they use to bind plants together.

### animal | vertebrate | fish | stonefish:

Reef stonefish
* Most reef stonefishs have spines.
* Some reef stonefishs have reproduction.
* are extremely well camouflaged, looking like an encrusted rock or lump of coral.

### animal | vertebrate | fish:

Triggerfish
* Most Triggerfishes are brightly colored and marked with patterns of lines and spots.
* Some triggerfish have large white spots
  - lipsticks
* are one of the easiest of all marine fishes to care for.
* have appearances
  - bony mouths
  - color patterns
  - colourful appearances
* have distinctive color patterns
  - fins
  - incisors
  - large incisors
  - tendencies
* includes brains
  - breasts
  - cell membranes
  - chest cavities
  - corpi
  - cytoplasm
  - ears
  - faces
  - fish scales
  - flippers
  - heads
  - nuclei
  - pedal extremities
  - plasma membranes
  - rib cages
  - sections
  - skulls
  - sperm
  - sterna
  - tail fins
  - vacuoles
  - vertebrate feet
  - yolks
* live singly, as pairs, in small groups or in schools.
* prefer water.

### animal | vertebrate | fish:

Tropical fish
* Many tropical fish do.
* Some tropical fish can change almost instantly from yellow to scarlet or from red to green
  - have larvae
* Some tropical fish prefer little salt
* are a valuable commodity in international trade
  - located in aquariums
* live in warm water and never venture into cold water.
* move faster, grow and reproduce faster.
* require warm water.
* ride the tidal currents, pushing further north into the bay.
* thrive in tanks with larger surface areas on top where oxygen levels are greater.