Fish identification archive / Three-Rowed Sea Cucumber

Three-Rowed Sea Cucumber

Isostichopus badionotus

Fun facts for your next surface interval

It processes organic resources in sediment. [source]
Several dessert-themed common names refer to the same accepted species. [source]
The corridor record is attributed to Blue Heron Bridge, Florida. [source]

Florida and local context

Florent Charpin’s individual photograph page identifies Isostichopus badionotus and explicitly places that photograph at Blue Heron Bridge, Florida.

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

Sources: Local occurrence record: Blue Heron Bridge, Florida

How to recognize this animal

The 2024 revision describes a firm, loaf-shaped body, wartlike dorsal papillae, a stout lateral fringe, twenty shield-shaped tentacles and three longitudinal rows of ventral tube feet. Colour varies from spotted or reticulated to uniform and black-and-yellow forms; spots alone are not diagnostic.

Sources: Modern primary species treatment

Size and life stages

The local identification guide lists 10 to 16 in. (25 to 40 cm). Its measurement axis and life-stage basis are not stated, so this is a guide value rather than a verified maximum, test diameter, arm span or harvest size.

Sources: Local occurrence record: Blue Heron Bridge, Florida

Habitat and where to look

The cited study compares habitats and reproduction in Colombian bays. Those measurements are not a Florida population survey; local inclusion rests on the Blue Heron Bridge photograph.

Sources: Biology reference for Isostichopus badionotus; Local occurrence record: Blue Heron Bridge, Florida

Range and local context

Corridor inclusion is based on Blue Heron Bridge, Florida. Florent Charpin’s individual photograph page identifies Isostichopus badionotus and explicitly places that photograph at Blue Heron Bridge, Florida. This is a documented occurrence, not a guarantee of a present-day encounter.

Sources: Local occurrence record: Blue Heron Bridge, Florida

What is on the menu?

The primary ecological study treats I. badionotus as a deposit feeder, using organic resources within surface sediment.

Sources: Biology reference for Isostichopus badionotus

Daily habits and behavior

The local record establishes presence at the stated place and time, not a daily activity schedule or encounter probability. Observe in place and record the animal’s substrate and posture; do not provoke a response for a photograph.

Mating and the next generation

Acosta and colleagues studied reproductive condition in Colombian populations named I. badionotus and Isostichopus sp. The 2024 revision reassigns the latter to I. maculatus phoenius. Keep the study groups separate; neither establishes a Florida spawning calendar.

Sources: Biology reference for Isostichopus badionotus; Modern primary species treatment

Look-alikes and identification traps

The revision distinguishes I. badionotus from the co-occurring I. maculatus phoenius: its dorsal and lateral papillae lack spiral lines, and dorsal papillae lack microscopic wormlike rod ossicles. These characters were not verified in the local photograph. Older records may combine species. The database lists Stichopus assimilis as a synonym, but the revision assigns its examined type to Holothuria; that disputed name is excluded from this page’s search aliases.

Sources: Modern primary species treatment; WoRMS: accepted identity

Observe without disturbing

Photograph the animal where it lives. Maintain buoyancy and keep fins, hands, lights and equipment clear of it and its substrate. Do not touch, feed, uncover, detach or reposition it. These observation practices do not grant permission to collect.

Harvest, protection and eating safety

Live collection only, where permitted

Listed marine-life group; live-only collection remains subject to location, gear and other restrictions.

This color is a qualified summary, not permission to collect or a guarantee that a particular animal is safe to eat.

Can it be hunted or harvested?

Isostichopus badionotus maps to the FWC-listed marine-life group Holothuroidea. This is conditional live collection, not food harvest. Keep alive with adequate life support. Recreational saltwater license required; no recreational sale. Daily limit: five per species within 20 total marine-life organisms; possession: ten per species within 40 total. Use permitted collection gear only; do not remove live rock or damagingly detach a host. No annual season or trip clearance is asserted.

Florida seasons and areas

No year-round or current-trip clearance. Blue Heron Bridge mapped dive-site waters are closed to marine-life harvest; nearby Peanut Island records do not establish that exact location. Biscayne ornamental collection requires a superintendent permit. Its separate mapped fishing/possession closure is March 1–May 31, effective March 2026, with properly stowed continuous transit excepted. Key Largo Management Area prohibits collection of these invertebrates; lobster and commercial trap exceptions do not authorize their collection. Sanctuary Preservation Areas prohibit collecting. Check exact boundaries and current park requirements, including Pennekamp, before any take. General state rules do not override these areas.

Can it be speared?

Do not spear a live-only organism. State and federal jurisdictions differ. FWC location restrictions and NOAA Key Largo spearfishing prohibition must be checked independently. Pennekamp is not a spearfishing allowance.

Is it safe to eat?

No exact-species food-safety clearance, meal frequency, or dated species-matched local menu evidence was verified. Recipes remain disabled. Collection legality is not evidence of edibility.

This review covers the Vero Beach–Key Largo Atlantic corridor: Indian River, St. Lucie, Martin, Palm Beach, Broward, Miami-Dade and Monroe counties. Florida Atlantic state waters and South Atlantic federal waters are distinct jurisdictions. Do not extend a state-water season tag to federal waters or transfer Atlantic rules to Gulf-side Keys waters. Park and sanctuary boundaries can override a species allowance. FWC expressly states that its marine-life regulations apply in federal waters; this does not erase independent federal restrictions.

Before you act: Confirm the species, date, exact management area, state or federal waters, gear, licenses and current local closures. A local occurrence record never grants permission to take an animal.

Official rules and health guidance

Reviewed 2026-11-11. Rules and advisories can change; check the linked authorities before acting.

Identification and source cautions

Historical occurrence does not establish current abundance, colony survival, or a guaranteed sighting.
No original profile, harvest/legal review, artwork, or publishing has been completed for this candidate.
Observation date was not supplied. Identification follows the named photographer; the specimen was not independently reidentified.
The exact local photograph is attributed to its source and has not been independently reidentified for this draft.
Biological source access varies: some records were accessible only as an abstract or indexed passage. Independent claim review is required.
No cited photograph is reproduced or licensed by this draft.

Sources and review

Reviewed 2026-11-11; biological claims and this representative illustration independently checked. Photographs on cited sites are reference material and are not reproduced here.

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