browser icon
You are using an insecure version of your web browser. Please update your browser!
Using an outdated browser makes your computer unsafe. For a safer, faster, more enjoyable user experience, please update your browser today or try a newer browser.

Species of the week: the crayfish

Posted by on September 18, 2012

by Zara Gladman, intern at the Society of Biology

My name is Zara and I’m an “astacologist”, which is a fancy way of saying that I study crayfish, lobster-like freshwater crustaceans of which there are more than 640 described species.  In Australia, they go by the name of “yabby” (as in “Yabby Creek” – Home and Away fans will understand).  In the American South, they’re called “crawfish” (Elvis Presley sang a rather catchy song about them in the film King Creole). In other parts of the world, they’re known as “crawdads” or “mudbugs”.

Crayfish are a fantastically diverse group, ranging in size from the tiny (2.5 cm) swamp crayfish (Tenuibranchiurus glypticus) of Australia to the giant Tasmanian crayfish (Astacopsis gouldi), which grows to over 80 cm and can weigh a whopping 5 kilograms!  Crayfish are also diverse in their choice of habitat, surviving in rivers, lakes and even caves.  And they’re not fussy eaters either, feeding on anything from plants and detritus to invertebrates (including each other), amphibians and fish.

The Tasmanian giant crayfish

Unfortunately, many crayfish species, including the swamp crayfish, Tasmanian giant crayfish and our very own British white-clawed crayfish (Austropotamobius pallipes), are endangered.  Some of the biggest threats include the spread of non-native crayfish species, disease and habitat loss. I’ll be blogging about the impact of non-native crayfish soon.  Until then, you can find out which crayfish species you are by taking this quiz here!

Crayfish have been of interest to humans throughout history, primarily as a food source. Swedes are particularly passionate about eating crayfish and throw crayfish parties, “kräftskivaevery August: a terrific excuse to meet with friends and family, wear silly hats, drink snaps and dine outside on a summer night.

A “crayfish party” in Sweden

7 Responses to Species of the week: the crayfish

  1. Chuck Worden

    hello my name is Chuck i live in n Tx. i am starting a crayfish farm from a swimming pool i have a 14×24′ shed to house them in ( to keep the varmits out ) i have done 3 mos of research for a buis that i can afford to opperate any suggestions

    P/S 817 240 9333

  2. Katy

    You are the North American signal crayfish (Pacifastacus leniusculus) – Cool name, would make a good song title…

  3. Greg

    Just completed the little quiz! Turns out I am the species I study :/ ha