Fish identification archive / Elysia zuleicae

Elysia zuleicae

Elysia zuleicae

Fun facts for your next surface interval

The local photograph’s identification is credited to Patrick Krug. [source]
The source reports about ten feet of water near Peanut Island. [source]
The observation is dated July 8, 2020. [source]

Florida and local context

JaxShells identifies Elysia zuleicae in a credited underwater photograph and gives Lake Worth Lagoon near Peanut Island, Palm Beach Inlet, Palm Beach County, Florida as its locality. This is a reported historical occurrence, not a present-day abundance claim.

A documented past record does not establish present abundance or guarantee an encounter.

Sources: JaxShells: credited named-site photograph and caption

How to recognize this animal

A green sacoglossan with rolled head tentacles and white specks or small white projections along thin side flaps. The margins can be uneven, but the primary description does not give it the siphonal openings of some similar Elysia.

Sources: Primary research: species treatment and observations

Size and life stages

A secure maximum is not provided here. Juveniles in the primary study were darker green and held their flaps flat against the food alga.

Sources: Primary research: species treatment and observations

Habitat and where to look

The credited photograph is from Lake Worth Lagoon near Peanut Island, Palm Beach Inlet, Palm Beach County, Florida. Its caption reports 10 feet of water. This is a documented observation setting, not the species’ complete habitat or depth range. Do not relabel a Peanut Island vicinity record as Blue Heron Bridge unless the source says so.

Sources: JaxShells: credited named-site photograph and caption

Range and local context

The corridor evidence here is restricted to the named locality in the photograph caption. A historical record is not proof of present abundance, a continuous Vero Beach–Key Largo distribution or a guaranteed sighting.

Sources: JaxShells: credited named-site photograph and caption

Feeding and diet

The primary Caribbean study reports specialization on Udotea flabellum, a green alga. This is species-level evidence, not a statement that every green blade at Peanut Island is its food.

Sources: Primary research: species treatment and observations

Daily habits and behavior

Adults in the primary study swam by undulating their side flaps when disturbed. Do not touch or dislodge an animal to make it swim.

Sources: Primary research: species treatment and observations

Mating and the next generation

The study describes a thin white ribbon of extra-zygotic yolk in the egg masses. Local spawning months and larval development times remain unverified.

Sources: Primary research: species treatment and observations

Look-alikes and identification traps

The reviewed description stresses variable appearance. A green color alone is insufficient; preserve views of the head tentacles and side-flap margins.

Sources: Primary research: species treatment and observations

Observe without disturbing

Use careful buoyancy and photograph the animal where it is. Do not touch, feed, chase, move, turn over its shelter or pull apart its algae or sponge. Leave eggs and attached organisms undisturbed. This observation guidance is not a conservation-status assessment or permission to collect; consult the separate scoped legal review and exact site restrictions before any collection.

Rules unverified; observe without collecting

Rules unverified for Elysia zuleicae (Plakobranchidae): FWC uses the historical group Opisthobranchia under nudibranchs/sea slugs, but an explicit official crosswalk for this non-nudibranch taxon was not verified. No unregulated-harvest fallback is inferred.

This scoped status is not permission to collect or a guarantee of food safety.

Harvest, collection and food status

Checked 2026-11-11.

Harvest status

Rules unverified; observe without collecting. Rules unverified for Elysia zuleicae (Plakobranchidae): FWC uses the historical group Opisthobranchia under nudibranchs/sea slugs, but an explicit official crosswalk for this non-nudibranch taxon was not verified. No unregulated-harvest fallback is inferred. For covered marine-life organisms, FWC requires live landing and continued live maintenance with an adequately sized circulating, aerated or oxygenated system, and a recreational saltwater license unless exempt. Limits are 20 organisms combined per person per day, at most five of one species; two-day possession is 40 combined, at most ten of one species. Use authorized collection gear. Recreational sales are prohibited. FWC states its marine-life rules also apply in federal waters. These requirements do not authorize killing for food. Obtain FWC confirmation of the exact taxon before collecting.

Season and jurisdiction

Vero Beach–Key Largo Atlantic corridor; recreational collection only. Exact state/federal jurisdiction, park and sanctuary boundaries, method, possession, landing and trip date must be checked. This is not trip clearance. Season status unverified for this exact taxon; no year-round or seasonal-harvest tag is assigned.

Closed areas and possession

The mapped Blue Heron Bridge dive site is closed to marine-life harvest; do not relabel every Peanut Island record as inside that boundary. Biscayne National Park prohibits ornamental collection without a superintendent collecting permit. Florida State Parks require express permission for animal collection; an ordinary fishing allowance at John Pennekamp is not clearance to collect sea slugs. In Key Largo Management Area, taking or injuring marine invertebrates is prohibited: the lobster/crab exceptions do not cover these mollusks. Sanctuary Preservation Areas, Ecological Reserves and research-only areas restrict taking and possession; lawful transit exceptions require their exact conditions. Overlapping zones apply together. Check mapped boundaries and posted restrictions before entry.

Collection method

Live-collection rules are not permission to spear or kill an animal. Key Largo Management Area independently prohibits spearfishing and carrying spearfishing equipment except specified uninterrupted transit or law-enforcement circumstances. Collection and possession restrictions can apply even when no spear is used.

Food and menu status

Not offered here as a food-harvest species. Exact-species food suitability and a dated local restaurant menu have not been verified. This is not a claim of proven toxicity, universal inedibility, or absence from every menu. Recipes are disabled; menu status is unknown.

Official sources

Identification and source cautions

Source-identified photograph, not independently reidentified anatomical or molecular voucher.
Photographs remain copyrighted; no reuse permission is implied.
Peanut Island records are not automatically Blue Heron Bridge sightings.
Capture date is retained in source caption when stated; a copyright year alone is not necessarily the observation date.
Source photographs are copyrighted reference material and are not reproduced in this draft.

Sources and review

Biological claims and depicted anatomy independently reviewed on 2026-11-11; publication and public-render verification remain pending. Photographs on cited sites are reference material and are not reproduced here.

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