stickleback
Small armored fish
A stickleback is a small freshwater or coastal fish with sharp spines along its back.
Sticklebacks are known for the male's elaborate nest-building and territorial behavior during breeding season.
They're common in streams, ponds, and tidal pools across the Northern Hemisphere: We caught sticklebacks in the creek with a jar.
Small freshwater fish
- tiddlerVery small fish
- schoolPlace of instruction
- shoalShallow water hazard
- spawningReleasing eggs to reproduce
nest-building · fry · fingerling · breeding · territorial · courtship · nuptial · male
Steady continuous flow
- pondSmall still body
- lakeEnclosed body of freshwater
- riverLarge flowing watercourse
- estuaryTidal mixing zone
brackish · tidepool · ditch · marsh · watershed · riparian · freshwater · saltwater
Stiff, pointed projections
- dorsalOf the back
- platesFlat eating dishes
- scutesHorny epidermal plates
- scalesPlates or weighing devices
fins · gills · lateral · bony · armored · sharp · pointed · barbed
Species changing over generations
- adaptationFitting to new conditions
- speciationFormation of distinct species
- geneticsScience of hereditary transmission
- morphologyStudy of structural forms
variation · Darwin · research · phenotype · genotype · hybridization · population · study
minnow
Small freshwater fish
spawning · nest-building · fry · fingerling · breeding · territorial · courtship · nuptial · male · female
stream
Steady continuous flow
estuary · brackish · tidepool · ditch · marsh · watershed · riparian · freshwater · saltwater · coastal
spines
Stiff, pointed projections
scales · fins · gills · lateral · bony · armored · sharp · pointed · barbed · pelvic
evolution
Species changing over generations
- adaptationFitting to new conditions
- speciationFormation of distinct species
- geneticsScience of hereditary transmission
morphology · variation · Darwin · research · phenotype · genotype · hybridization · population · study · laboratory
- fishcod, salmon, bass, perch, eels
- freshwater lifecatfish, trout, bass, salmon, frog
- Baltic wildlifegrey seal, harbor seal, herring, cod, flounder
- rockpool fishgoby, blenny, butterfish, clingfish, gunnel
- tidepool fishclingfish, goby, mudskipper, blenny, sculpin
- Atlantic fishAtlantic cod, Atlantic salmon, haddock, pollock, pollack
sticklebackwhale shark
Biggest fish species
great white shark · salmon · tuna · marlin · swordfish