Dolomedes triton (Walckenaer, 1837)

sixspotted fishing spider



Immatures or Unknown Sex

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How to Identify Dolomedes triton (Walckenaer, 1837)

Family: PISAURIDAE Simon, 1890

Genus: Dolomedes Latreille, 1804

Species: Dolomedes triton (Walckenaer, 1837)

Origin of Name: Dolomedes is derived from Greek as a combination of words, ultimately meaning "trick, stratagem, wily, contriving".

Official Common Name: sixspotted fishing spider

Male dimensions A = 5.15 mm 
B = 4.37 mm 
C = 4.33 mm 
Male dimensions A = 7.38 mm 
B = 9.25 mm 
C = 6.3 mm 

Distinguishing Characteristics

Carapace greenish grey to tan. Several indistinct dark bands radiate from dorsal groove. Margins dark, submarginal bands white and extend length of carapace. Legs pale with grey, irregular, dorsal lines. Abdomen pale brown to dark reddish-brown, has series of small paired white spots. Posterior of abdomen with indistinct transverse bands. Heart mark is pale.


Southern Alaska to Maine, south to southern Mexico and Cuba.

Collection Map of Museum Specimens
in The Nearctic Spider Database

Museum Specimens in The Nearctic Spider Database

Typical Habitats

Individuals are often found on or at the margins of ponds, lakes, and quiet rivers and streams.

Activity Patterns

Adults appear late May or early June until September and egg sacs can be found from July to September.

Other Web Pages

Animal Diversity Web (

The Nearctic Spider Database (

Recent Submissions

Dolomedes triton (David Bree [May 12, 2007])Observation Date: May 12, 2007 Coordinates: 43.9098, -77.2888 Observer: David Bree
Observation: In "panne" - temporary pools in low areas between sand dunes in Sandbanks Provincial Park

Dolomedes triton (Brandi Fleshman [June 11, 2006])Observation Date: June 11, 2006 Coordinates: 64.5917, -147.0708 Observer: Brandi Fleshman
Observation: Salcha Alaska, on surface of small pond. Gravid female (made eggsac next day). There were several immatures running around the area as well.