Hedgpeth'S Sapsucker
ExploreInvertebrate
Hedgpeth'S Sapsucker
elysia hedgpethi
Hedgpeth's Sapsucker (Elysia hedgpethi) is a fascinating marine gastropod belonging to the sacoglossan group, often referred to as sap-sucking sea slugs. Found along the Pacific coast of North America, this remarkable creature is famous for its solar-powered lifestyle. It feeds on green siphonous algae, particularly species of Codium, using a specialized radula to pierce the algal cell walls and suck out the cellular fluids. Instead of digesting everything, it selectively retains the living chloroplasts within its own digestive gland cells. For quick identification of Hedgpeth'S Sapsucker during outdoor trips, download the Snappit app.
Habitat: Typically found in intertidal rocky shores, estuaries, and coastal tide pools, closely associated with beds of green algae like Codium.
Appearance
This small, slender sea slug typically reaches lengths of 1 to 3 centimeters. Its body is primarily olive to bright emerald green, a color derived from the symbiotic chloroplasts inside its tissues. The dorsal surface features wing-like flaps called parapodia, which fold over its back and are often speckled with minute, iridescent blue, red, or white dots. Its head features two prominent, rolled rhinophoral tentacles used for sensing chemicals in the water, and its overall leaf-like shape provides excellent camouflage amidst marine algae.
KingdomAnimaliaPhylumMolluscaClassGastropodaFamilyPlakobranchidaeGenusElysia
Category
InvertebrateRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
Hatchlings are born completely translucent white; they only turn green after taking their very first meal of chlorophyll-rich green algae.
Their name Elysia honors the mythical paradise of Elysium, highlighting the elegant, leaf-like appearance of this genus.
They are widely known as 'solar-powered sea slugs' because of their ability to live off photosynthesis when algae is scarce.
Special abilities
Ability
Solar Powered Symbiosis
Retains functioning chloroplasts from its algal prey, allowing it to undergo photosynthesis and survive without eating for weeks.
Ability
Suction Feeding Radula
Features a specialized, blade-like radular tooth designed to puncture tough algal cells to extract cytoplasm without damaging the chloroplasts.
Ability
Algal Mimicry Camouflage
Blends perfectly with its host algae due to its matching coloration, shape, and slow movement, avoiding predators.
Diet & Feeding
Feeds exclusively on the cellular fluids of green siphonous algae, retaining the functional chloroplasts for energy.
Age differences: Planktonic veliger larvae feed on phytoplankton before metamorphosing and switching to a macroalgae diet.
Primary Foods
- Dead Man's Fingers (Codium fragile)
- Sea Staghorn (Codium fragile)
- Bryopsis species
Foraging Method
- Grazing
Ecological connections
host plant
Dead Man's Fingers
Codium fragile
Primary host plant where the slug lives, feeds, and lays its eggs.
eaten by
Striped Shore Crab
Pachygrapsus crassipes
Preys on small gastropods and marine invertebrates in coastal tidepools.
competitor
Taylor's Sea Hare
Phyllaplysia taylori
Competes for algae resources and space in similar estuarine microhabitats.
Traits
No trait badges are assigned for this object yet.
Also known as
No aliases listed yet.
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Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Hedgpeth'S Sapsucker?
The easiest way to identify Hedgpeth'S Sapsucker is to use the Snappit nature identifier app.
What does Hedgpeth'S Sapsucker eat?
Feeds exclusively on the cellular fluids of green siphonous algae, retaining the functional chloroplasts for energy.
Where is Hedgpeth'S Sapsucker usually found?
Typically found in intertidal rocky shores, estuaries, and coastal tide pools, closely associated with beds of green algae like Codium.
How does Hedgpeth'S Sapsucker hunt?
Grazing
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