Fish identification archive / Berghia creutzbergi

Berghia creutzbergi

Berghia creutzbergi

Fun facts for your next surface interval

Close detail of the head tentacles is important to the identification. [source]
The local photo was made in 12 feet of water. [source]
The local source uses the older name Spurilla creutzbergi. [source]

Florida and local context

JaxShells identifies Spurilla creutzbergi 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

The museum discussion describes a brownish animal with extensive white spots or pigment and bumpy, rather than regularly ringed, head tentacles. The identification history is cautious: close detail of the head tentacles matters more than an overall white-spotted appearance.

Sources: Australian Museum Sea Slug Forum: species account and attributed observations

Size and life stages

The original account discussed by the museum described a living 15 mm animal from Curaçao. A later Bahamian example was 4.5 mm. These are individual records, not a growth series or a Florida maximum.

Sources: Australian Museum Sea Slug Forum: species account and attributed 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 12 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

A reliable species-specific diet was not established in the sources reviewed for this draft. Habitat, nearby organisms and the feeding habits of related slugs are not used as substitutes for direct evidence.

Daily habits and behavior

The cited observations describe the body appendages rocking sideways while the animal moves. The local photograph does not independently establish that movement, and its exact occurrence at Peanut Island is not assumed.

Sources: Australian Museum Sea Slug Forum: species account and attributed observations

Mating and the next generation

Species-specific reproductive details remain limited in the reviewed evidence. No Florida spawning season, egg identification, maturity size or larval schedule is claimed. An egg mass near an animal does not alone establish parentage.

Look-alikes and identification traps

Some white-spotted Caribbean animals were confused with Spurilla. The museum discussion emphasizes bumpy head tentacles versus clearly transverse ridges in another photographed animal. A distant photograph that cannot show this distinction should remain uncertain.

Sources: Australian Museum Sea Slug Forum: species account and attributed 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.

Live collection only; site restrictions

Berghia creutzbergi is reviewed as a nudibranch in Aeolidiidae, matching FWC's explicitly listed nudibranch/sea-slug marine-life group. Yellow means live collection subject to limits and site restrictions, not food harvest.

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

Live collection only; site restrictions. Berghia creutzbergi is reviewed as a nudibranch in Aeolidiidae, matching FWC's explicitly listed nudibranch/sea-slug marine-life group. Yellow means live collection subject to limits and site restrictions, not food harvest. 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.

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. The reviewed FWC recreational marine-life summary specifies no scheduled annual closure for this nudibranch group. This is not a year-round collection guarantee and does not override permanent, temporary or seasonal area closures.

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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