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Friday, March 24, 2017

New Zealand 2017 - Freshwater Fish



COUNTRY: NEW ZEALAND
ISSUE DATE: 1 March 2017
STAMP THEME:Freshwater Fish
STAMP SIZE: 50 x 35 mm
STAMP DESIGN: Stephen Fuller




More than 40 different species of freshwater fish have been identified in New Zealand’s waterways. Around three-quarters of these secretive and largely nocturnal natives are already endangered, which is a troublingly high number compared to other countries. Some of the issues our freshwater fish face include barriers in migration, destruction of habitat and the introduction of predators such as trout.

MINIATURE SHEET

Many of New Zealand’s freshwater fish species have had to evolve unique attributes in order to live in our varied habitats. The lowland longjaw galaxias is so named for its distinctive upturned lower jaw, the redfin bully has taught itself to climb, the longfin eel can live for up to 100 years, the lamprey is commonly known as a “vampire parasite” and the torrentfish has a unique zebra-style camouflage.

From deep ice-cold lakes to fast moving raging rapids, the vast range of species found in New Zealand’s waterways are celebrated with these beautifully illustrated stamps. The diversity of New Zealand’s aquatic life is clearly apparent when these stamps are viewed side by side.

FIRST DAY COVERS


STAMPS


$1.00 Lowland Longjaw Galaxias
With its thin, elongated body and small fins, the glittery lowland longjaw is one of the ‘pencil’ galaxias. This shape allows them to burrow into the gravel to lay eggs, feed and to survive during flooding or low flows. They are named after their distinctive upturned lower jaw. Found only in the Kauru and Kakanui Rivers, and a handful of streams in the upper Waitaki catchment, this species is thought to have less than 250 mature adults, making it one of our rarest native fish species.


$1.80 Redfin bully, Toitoi
Bring on the colour circus! The redfin bully male has flashy red markings on his tail and fins compared to the duller brown female. He dutifully guards their eggs until they hatch, temporarily turning black for this role. You can spot a redfin bully by the diagonal strips on the cheeks, similar to war paint. The redfin tends to live close to the coast in stony streams and these acrobatic climbers can be found above waterfalls. The young larvae of the species wash out to sea and return to freshwater as juveniles.


$2.20 Longfin eel, Tuna
This familiar favourite is only found in New Zealand, can live for over 100 years and grow into legendary two-metre giants. Sadly, eels of this size are becoming rarer, as concerns grow over the effects of commercial fishing, habitat destruction and damming. Tuna is of utmost significance to Māori, and traditionally was an important food source. Found widespread around New Zealand, the young elvers are phenomenal climbers of waterfalls. The longfin must complete an epic migration to Tongan waters to breed right at the end of their life.


$2.70 Lamprey, Kanakana, Piharau
The lamprey is a primitive jawless fish, sometimes mistaken for an eel. It has a round mouth with rasping teeth and seven gill pores among other distinctive features. Lamprey adults spend their lives at sea as ‘vampire parasites’ on other fish, then migrate to freshwater to breed. In freshwater, they change from a metallic blue to a dull brown, and the male develops a bizarre baggy pouch under the eyes. The species is found around the Southern Hemisphere.


$3.30 Torrentfish, Panoko

This riffle-surfer has adapted to fast-flowing water. In fast flows its strong pectoral fins anchor it to the riverbed and prevent it from washing away! The zebra-like camouflage colourings and its tendency to freeze when threatened make this a hard fish to spot. It moves into slower flows at night to feed. The torrentfish is endemic to New Zealand and typically widespread throughout. It resembles its more familiar marine relative, the blue cod.





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Stamp images and description thanks to New Zealand Post


New Zealand Post