Red Aldisa
Aldisa sanguinea (Cooper, 1863)
Description 2
Ground color light red to dark crimson, occasionally yellow-orange to yellow-green; dorsum with small tubercles, and sprinkled with very minute dark brown to black dots. With 1 or 2 large black spots on median line of dorsum, one just posterior of rhinophores and the other just anterior of branchial plumes, one or both spots may be absent, especially in small individuals. Large individuals may have patches of yellow to yellow-green laterally on either side of the dorsum, about two thirds of the distance from anterior end, and also posterior of branchial plumes. Rhinophores reddish, with about 12-15 lamellae. Branchial plumes 8-10, unipinnate, light red to crimson. Labial tentacles auriform. Can be distinguished from the similar Rostanga pulchra which has distinctive rhinophores with nearly vertical lamellae; and lacks the two large, round black spots on median line of the dorsum; and appears fuzzier on the dorsum.
Size 2
Typically about 15-25 mm in length, but may reach 50mm.
Geographic Range 2
Campbell River, British Columbia, Canada, to Gulf of California, Mexico.
Notes 2
Preys on red sponges.
References 2
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iNat Map
| Body | doridiform |
|---|---|
| Classification | Doridina |
| Rhinophores | perfoliate |
| Labial tentacles | auriform |
| Dorsum | finely tuberculate |
