Fish identification archive / Shameface heart crab

Shameface heart crab

Cryptosoma balguerii

Fun facts for your next surface interval

Its shell is densely covered in granules. [source]
Burial behavior can make it difficult to find. [source]
DNA markers helped confirm a published São Paulo record. [source]

Florida and local context

Florent Charpin’s species gallery identifies the photographed animal as Cryptosoma balguerii and explicitly captions the photograph Blue Heron Bridge, Florida.

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

Sources: Named Blue Heron Bridge photograph

How to recognize this animal

A domed, densely granular crab with prominent branchial bumps and short, curved lateral spines. Shell and claw details are important identification clues.

Sources: Nauplius: morphology and DNA-confirmed Brazilian occurrence

Size and life stages

The Brazilian female measured 31.57 mm in carapace length and 34.00 mm in carapace width; these are specimen measurements, not species maxima. The local guide’s 3-inch figure has an unclear dimension, so no whole-animal size filter is assigned.

Sources: Nauplius: morphology and DNA-confirmed Brazilian occurrence; Named Blue Heron Bridge photograph

Habitat and where to look

The paper describes burial in rocky, sandy and muddy bottoms. Watch exposed outlines without digging.

Sources: Nauplius: morphology and DNA-confirmed Brazilian occurrence

Range and local context

The paper documents a southward record in São Paulo, Brazil. Separately, the photographer identifies a Blue Heron Bridge, Florida animal as this species; that exact caption is the local evidence.

Sources: Nauplius: morphology and DNA-confirmed Brazilian occurrence; Named Blue Heron Bridge photograph

What is on the menu?

The reviewed sources do not establish a species-specific diet. Family membership alone cannot supply a local prey list.

Sources: Nauplius: morphology and DNA-confirmed Brazilian occurrence; Named Blue Heron Bridge photograph

Daily habits and behavior

Burial hinders detection, so few sightings do not directly measure population rarity.

Sources: Nauplius: morphology and DNA-confirmed Brazilian occurrence

Mating and the next generation

The study examined a female but supplies no Florida breeding season or complete developmental sequence.

Sources: Nauplius: morphology and DNA-confirmed Brazilian occurrence

Look-alikes and identification traps

The paper flags possible errors in historical Cryptosoma sequence identifications. Check detailed morphology rather than trusting an old name label.

Sources: Nauplius: morphology and DNA-confirmed Brazilian occurrence

Observe without disturbing

Leave buried animals in place and avoid handling, chasing or feeding them. Photograph visible shell features without excavating sediment.

Sources: NOAA responsible diving

Harvest, protection and eating safety

Do not harvest (CC guidance)

CC means conservation and common sense. Leave this animal in place; do not collect, spear, kill or retain it. This is conservation guidance, not a claim that all harvest is legally prohibited. Independent statutory rules and unresolved legal questions remain separate below.

Separate legal assessment retained:

Unknown: exact harvest rules need verification

Exact species and jurisdiction clearance remains unresolved. Unknown is not a protected or prohibited classification.

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?

Cryptosoma balguerii is not a stone crab, blue crab, or one of the named ornamental crabs. No food-crab season, bag or method is inferred. This review does not establish complete bag, size, method or season clearance for this exact taxon.

Florida seasons and areas

Annual season and current-trip openness remain unverified; missing restrictions are not permission. Check mapped boundaries before any take. Blue Heron Bridge prohibits marine-life collection within the designated dive-site area, not all county fishing. Biscayne prohibits ornamental collection without a superintendent permit and has a mapped March 1–May 31 fishing/possession closure, effective March 2026, with properly stowed continuous transit excepted. Pennekamp prohibits tropical-fish collection and spearfishing. Key Largo Management Area prohibits taking tropical fish and marine invertebrates; the latter exceptions are commercial spiny-lobster/stone-crab trapping and recreational spiny-lobster hand/hand-gear take under applicable rules, not recreational crab collection. It separately prohibits spearfishing. Sanctuary Preservation Areas prohibit fishing and collection subject only to expressly stated exceptions. These are site restrictions, not a corridor-wide fishing ban.

Can it be speared?

Species-specific spearing clearance is unverified; do not treat a missing prohibition as permission. FWC restricts spearfishing near public swimming beaches, fishing piers/bridges, jetties and in state parks. The Long Key-north Monroe restriction concerns state waters; Key Largo Management Area has a separate prohibition. Federal location alone is not clearance.

Is it safe to eat?

No species/site-specific food-safety clearance or meal frequency was established. Legal harvest does not mean safe to eat; some marine toxins survive cooking and freezing. Consult current Florida Health guidance and local advisories. No dated, species-matched local menu evidence was verified; recipes remain disabled.

Cryptosoma balguerii is not a stone crab, blue crab, or one of the named ornamental crabs. No food-crab season, bag or method is inferred.

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.

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

The local identification is the photographer’s, not an independently examined voucher.
The published specimen measurement is not a maximum; photo-guide size dimension is unclear.
No verified species-specific diet or Florida reproduction schedule is supplied.
Brazilian occurrence research is not evidence of abundance at Blue Heron Bridge.

Sources and review

Biology and taxonomy reviewed 2026-11-11. Photographs on cited sites are reference material and are not reproduced here.

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