1. Australian longfin eel
   Banded Kokopu
2. Chatham Mudfish
   Bluegill Bully

The Australian longfin eel is unique because of the black spots and patches all over its body. It's also from the Waikato River.

1. Common smelt
   Shortfin eel
2. Grey mullet
   Estuarine triplefin

The shortfin eel can live in a variety of harsh environments, such as extreme temperatures and places with very little oxygen. These types of eels are very common throughout New Zealand.

1. Shortfin eel
   Perch
2. Atlantic salmon
   Upland bully

Similar to the aesthetics of the brown trout, Atlantic salmon are also common for sport fishing. Adult Atlantic salmon in New Zealand tend to live in lakes.

1. Northland mudfish
   Rudd
2. Yellow-eyed mullet
   Redfin bully

The redfin bully is unique for its vibrant black blotches and red tail and fin. These are also considered to be a diadromous type of fish.

1. Perch
   Brook char
2. Bluegill bully
   Canterbury mudfish

The perch is not fond of fast-moving waters, and feeds off other fish to survive. Its scientific name is Perca fluviatilis Linnaeus.

1. Atlantic salmon
   Brook char
2. Australian longfin eel
   Brown trout

The brook char is a type of dark fish with vibrant spots on its back. They are also known for their wide mouth.

1. Goldfish
   Grey mullet
2. Bluegill bully
   Giant bully

The bluegill bully doesn't feature any blue colors but it does have brown spots all over its body. These fish also love to snack on larvae.

1. Bluegill bully
   Grey mullet
2. Giant bully
   Canterbury mudfish

The Canterbury mudfish are unique due to their small eyes and eel-like body. This fish was also discovered in 1926.

1. Atlantic salmon
   Brook char
2. Grey mullet
   Giant bully

The grey mullet belongs to the Mugilidae family, which actually means "mullet family." This fish is also primarily found throughout the Northern regions of New Zealand.

1. Goldfish
   Grass carp
2. Longfin eel
   Giant bully

You'll find many types of goldfish throughout the Northern regions of New Zealand. These fish are also bright gold in color with soft fins.

1. Goldfish
   Grass carp
2. Koi carp
   Inanga

Found primarily in the Northern regions of New Zealand, the grass carp features vibrant silver and bronze hues on its body. These fish are also useful for removing certain weeds from lakes.

1. Dart goby
   Koi carp
2. Inanga
   Cran's bully

The inanga fish is found throughout the borders of New Zealand and can be found in various streams and lakes. Its scientific name is Galaxias maculatus.

1. Koaro
   Giant bully
2. Mackinaw
   Cran's bully

The Cran's bully belongs to the Eleotridae family, and is considered to be a non-diadromous type of fish. It was also discovered in 1842.

1. Mackinaw
   Koaro
2. Giant bully
   Common carp

The mackinaw fish swims with both brown trout and rainbow trout in Lake Pearson. These fish can be found throughout North America as well.

1. Crans bully
   Eldon's galaxias
2. Goldfish
   Giant bully

Eldon's galaxias is a member of the galaxiid family, and is considered to be a non-diadromous type of fish. These fish also have unique brown stripes on their body.

1. Silver carp
   Rudd
2. Rainbow trout
   Koaro

Koaro fish are shaped like a tube and exude brown patches on its body. These fish are also found throughout the southwestern borders of New Zealand.

1. Chinook salmon
   Atlantic salmon
2. Koi carp
   Hucho

Also called the common carp, the Koi carp features vibrant yellow and black hues on its body. This fish is also found in the northern regions of New Zealand.

1. Silver carp
   Tarndale bully
2. Rudd
   Dart goby

The dart goby features very tiny scales and fins, as well as light purple hues. This type of fish was also discovered in 1985.

1. Rudd
   Rainbow trout
2. Goldfish
   Silver carp

The silver carp features shimmering hues of silver, and is found in the northern regions of New Zealand. This type of fish is also known to eliminate aquatic plant growth in New Zealand.

1. Rudd
   Atlantic salmon
2. Trout
   Chinook salmon

The rudd fish belongs to the Cyprinidae family and is an herbivorous type of fish. Their date of discovery was 1758.

1. Rainbow trout
   Rudd
2. Carp
   Minnow

The rainbow trout was discovered in 1792 and features vibrant rainbow colors. These fish are also a member of the Salmonidae family.

1. Guppy
   Gambusia
2. Swordtail
   Sailfin molly

The gambusia fish is also known as the mosquitofish due to the large quantities of mosquito larvae that they eat. This is also an aggressive type of fish.

1. Gambusia
   Torrentfish
2. Sailfin molly
   Sockeye salmon

The sailfin molly bears the scientific name, Poecilia latipinna. These types of fish are also known for their dorsal fin, which is very large in size.

1. Gambusia
   Perch
2. Swordtail
   Roundhead galaxias

While these may resemble a goldfish in color, swordtails feature a sword-like tail that extends from its back. These are also a Poeciliidae type of fish.

1. Rainbow trout
   Atlantic salmon
2. Shortjaw kokopu
   Goldfish

An undercut jaw means that the upper part of a fish's jaw is longer than its bottom half. The shortjaw kokopu is unique because of this.

1. Sockeye salmon
   Rudd
2. Redfin bully
   Tench

You'll find plenty of sockeye salmon in the Waitaki catchment of New Zealand. These fish also swim with other types of trout, as well as Chinook salmon.

1. Rainbow trout
   Atlantic salmon
2. Torrentfish
   Chinook salmon

Torrentfish are unique for their large brown stripes over their body. These fish also love the swift waters of New Zealand.

1. Upland bully
   Rudd
2. Torrentfish
   Shortfin eel

This fish belongs to the Eleotridae family, and is considered to be non-diadromous. Upland bullies can also be found on the South Island's east coast of New Zealand.

1. Goldfish
   Swordtail
2. Rudd
   Tench

The tench fish is primarily green in color and was discovered in 1758. The eyes of this fish are also vibrant orange in color.

1. Yelloweye mullet
   Shortfin eel
2. Torrentfish
   Guppy

The yelloweye mullet is a member of the Mugilidae family and features 2 dorsal fins. Its name, of course, refers to its vibrant yellow eyes.

1. Pancake stingrays
   Bull shark
2. Electric eel
   Orfe

The orfe fish likes to munch on both plants and small animals, like worms. These fish also feature dull red and white colors.

1. Northland mudfish
   Brown trout
2. Orfe
   Rudd

The brown trout features a light white-orange hue with an overlay of brown freckles on its body. This fish is also incredibly common throughout the South Islands of New Zealand.

1. Dwarf galaxias
   Northland mudfish
2. Grayling
   Atlantic salmon

Once a native fish of New Zealand, the grayling is currently extinct, which happened around the 1930s. This fish was also an herbivore.