Physical Description
The Three Lined Aeolid, scientifically known as Flabellina trilineata, is a seasonally abundant species found along the eastern Pacific coast, ranging from Baja California, Mexico, to Alaska. It typically grows to about 35mm in length. This aeolid features three distinct white lines running down its body, a characteristic from which it derives its name. Notably, the median line divides on the head, sending a branch along each oral tentacle. However, observations by Bruce Wight suggest that occasionally, these white lines may be absent.
Habitat and Geographical Range
Flabellina trilineata thrives in marine environments along the eastern Pacific coast, with its range extending from Baja California, Mexico, to Alaska.
What They Eat and How They Breed
This species primarily feeds on hydroid polyps, with a particular affinity for species such as Tubularia and Eudendrium californicum. For reproduction, Three Lined Aeolids likely engage in standard nudibranch breeding behavior, laying eggs in gelatinous masses.
Similar Nudibranchs
There are other species of aeolid nudibranchs that are very similar to the Three-Lined aeolid. The key features to look for are the three white lines running down its body. If this feature does not exist, it may be one of these similar species.
Thick-horned Nudibranch
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Scarlet-Tip Aeolis
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Smooth-Tooth Aeolis
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Opalescent Nudibranch
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