Jeff Goddard, USA
Info
Gammarellus angulosus is an Atlantic amphipod that clings to algae on highly exposed rocky shores.
Distinctive feature: the eyes of the amphipod are large and occupy at least half of the lateral surface of the head, they are not widely spaced dorsally
The life cycle of the crustacean, which is important for the food chain, is 1 year.
Mature females produce multiple broods except between September and November when they are dormant.
Fecundity increases with the size of the female.
The young of the November brood are released by the females in May, and the adults disappear in summer.
Color: Yellowish, mottled awith reddish brown.
Habitat: In tide pools, in algae zones, and on muddy sand mixed with somewhat coarser material.
Food: Red algae Heterosiphonia japonica
Similar species: Gammarellus homari (J.C. Fabricius, 1779).
Synonyms:
Amathilla angulosus (Rathke, 1843)
Amathilla sabini (Leach, 1819)
Gammarus angulosus Rathke, 1843
Gammarus sabini Leach, 1819
Distinctive feature: the eyes of the amphipod are large and occupy at least half of the lateral surface of the head, they are not widely spaced dorsally
The life cycle of the crustacean, which is important for the food chain, is 1 year.
Mature females produce multiple broods except between September and November when they are dormant.
Fecundity increases with the size of the female.
The young of the November brood are released by the females in May, and the adults disappear in summer.
Color: Yellowish, mottled awith reddish brown.
Habitat: In tide pools, in algae zones, and on muddy sand mixed with somewhat coarser material.
Food: Red algae Heterosiphonia japonica
Similar species: Gammarellus homari (J.C. Fabricius, 1779).
Synonyms:
Amathilla angulosus (Rathke, 1843)
Amathilla sabini (Leach, 1819)
Gammarus angulosus Rathke, 1843
Gammarus sabini Leach, 1819
