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Metanephrops challengeri

life science Maturity 11-13 Next article →

The New Zealand lobster is a slim, pink sea creature.

Metanephrops challangeri Bate
Metanephrops challangeri Bate

People also call it New Zealand scampi. These lobsters live in burrows deep under the ocean. They stay near the coasts of New Zealand and the Chatham Islands. Most live at depths between 140 and 640 meters. This is quite deep in the dark water. They like to live in soft sediments.

Zealandia-Continent map en
Zealandia-Continent map en

This lobster is a very important part of the ocean food web. Large fish called ling like to eat them. Humans also catch them to eat as a luxury food. Trawlers catch about 1,000 tonnes of them every year. This is done under a special rule called the Quota Management System. This system helps set limits so too many are not caught at once.

An adult lobster has a very specific look.

Metanephrops challangeri Bate
Metanephrops challangeri Bate

They are usually 13 to 18 centimeters long. Some can grow as large as 25 centimeters. They weigh about 100 grams. Their bodies are mostly white with pink and brown marks. They have two long, thin claws called chelipeds. They also have smaller claws on other legs. Their shell, or carapace, is very smooth. It even has a long, narrow part called a rostrum. This rostrum is almost as long as the shell itself. The lobster uses these parts to move and live in its burrow.

Life begins with tiny blue eggs.

Status iucn3.1 LC
Status iucn3.1 LC

Female lobsters lay large eggs in small numbers. These eggs are about 2.5 millimeters wide. The babies hatch as tiny larvae called zoea. These little ones are only about 10 to 11.5 millimeters long. They use their legs to swim through the water. This stage is very fast and lasts less than four days. Then, they molt, which means they shed their old skin to grow. They become post-larvae and use small swimming parts called pleopods. Eventually, they molt again to become adults. It is hard to see them in the wild because they grow so quickly.

Scientists have studied these lobsters for a long time.

Metanephrops challangeri Bate
Metanephrops challangeri Bate

The Challenger expedition first found them between 1872 and 1876. At first, they were grouped with other similar species. A scientist named Heinrich Balss named them as a separate species in 1914. He used two female specimens from the expedition. Those specimens are now in a museum in London. In 1972, Richard Jenkins moved them to a new group called Metanephrops. This was because they were different from the original lobster group. Scientists still study their DNA to learn how they are related to other animals.

Even though they are common, we must watch over them.

Status iucn3.1 LC
Status iucn3.1 LC

The species is currently listed as Least Concern on the IUCN Red List. This means they are not in immediate danger. However, some counts show the number of lobsters might be going down. Some experts think there are 28 million lobsters in the sea. Other studies suggest there may only be 2 to 11 million. Fishing boats must be careful not to catch other animals by mistake. For example, they sometimes catch the New Zealand sea lion. This is a vulnerable animal that we need to protect.

Sea lion on the beach
Sea lion on the beach
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🖼️ Images & Media (6)
File:Flag of New Zealand.svg
Flag of New Zealand.svg
File:Zealandia-Continent map en.svg
Zealandia-Continent map en.svg
File:Status iucn3.1 LC.svg
Status iucn3.1 LC.svg
File:Sea lion on the beach.jpg
Sea lion on the beach.jpg
File:Charybdis japonica.jpg
Charybdis japonica.jpg
File:Metanephrops challangeri Bate.png
Metanephrops challangeri Bate.png
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