Jassa falcata
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| Jassa falcata (Montagu, 1808) |
Jassa falcata, commonly known as scud, is a tube-dwelling amphipod in the genus Jassa.
Jassa falcata is one of the thousands of species of amphipod. Like lobsters, crabs and shrimps, amphipods are crustaceans in the class Malacostraca.
Jassa falcata constructs tubes of debris. It is a fouling organism, growing on the bottoms of ships and slowing them down. J. falcata forms dense mats or nests. The male and the female live in different tubes. J. falcata feeds generally on hydroid growth on the bottom of rafts and ships. It is generally a suspension feeder normally found on sediment areas.
Amphipods have two pairs of antennae. In J. falcata the first antennae have two-segmented flagella and are shorter and more slender than the second antennae. Males are 7-13 mm long and females are 6-12 mm. Colors vary but are usually yellow-grey with brown, red or black patches depending on the color of the habitat.
