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Soapfish (Rypticus subbifrenatus) — Serranidae

Soapfish

Rypticus subbifrenatus
Family: Serranidae
LC · Least Concern

The Soapfish (Rypticus subbifrenatus) is a saltwater fish of the family Serranidae that grows up to 18 cm.

Length
18 cm
Water
Saltwater
Depth
1.0–26.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Torpedo-shaped
Substrate
Stone or rock
Danger
Harmless
Range
Coral reefs and rocky shores of the western Atlantic and the Caribbean.
Edibility
Not eaten

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Description

The spotted soapfish (Rypticus subbifrenatus) is a sea bass relative of the family Serranidae from the western Atlantic and Caribbean. The species has a stocky, dark-brown body with numerous small pale and dark spots and reaches about 18 cm. It inhabits clear tropical waters to about 26 metres deep, but is most often found in very shallow water. It is a shy, secretive fish that stays among rocks and coral and hunts fishes and crustaceans at night. Soapfishes secrete a toxic, bitter mucus (grammistin) when disturbed, which foams in water; for this reason the species is not eaten.

Frequently asked questions

How do you recognise the Soapfish?

The Soapfish has a torpedo-shaped body, is mainly brown and shows a spots pattern. When disturbed it secretes a poisonous, foaming mucus (grammistine); shy nocturnal hunter.

Where does the Soapfish live?

The Soapfish lives in the sea (marine waters) and is mostly found around stony or rocky ground. Coral reefs and rocky shores of the western Atlantic and the Caribbean.

How big does the Soapfish get?

The Soapfish grows to a maximum of about 18 cm.

Is the Soapfish dangerous to humans?

No, the Soapfish is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.

Is the Soapfish edible?

The Soapfish is not usually eaten.

More photos

Soapfish (Rypticus subbifrenatus) — Serranidae — 2
Baldwin, Carole C., Griswold, Donald (CC0 1.0) via GBIF — USNM
Soapfish (Rypticus subbifrenatus) — Serranidae — 3
iNaturalist ((c) Austin D West, some rights reserved (CC BY-NC))
Soapfish (Rypticus subbifrenatus) — Serranidae — 4
iNaturalist ((c) Joe MDO, some rights reserved (CC BY-NC))
Soapfish (Rypticus subbifrenatus) — Serranidae — 5
iNaturalist ((c) Martin Holladay, some rights reserved (CC BY-NC))
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All data

Identification

English name
Soapfish verified
Scientific name
Rypticus subbifrenatus
Family
Serranidae
Other names
Spotted soapfish; Spotted Soapfish verified

Appearance

Size class
Medium verified
Max length (cm)
18.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Brown inferred
Pattern
Spots inferred
Tail shape
Rounded inferred
Mouth position
Terminal inferred
Lips
Thick / fleshy inferred
Barbels
No sourced
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Saltwater sourced
Substrate
Stone or rock sourced
Min depth (m)
1.0 verified
Max depth (m)
26.0 verified
Natural range
Coral reefs and rocky shores of the western Atlantic and the Caribbean. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Fishes and crustaceans sourced
Social behaviour
Solitary inferred
Territorial
No inferred
Activity
Nocturnal inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
When disturbed it secretes a poisonous, foaming mucus (grammistine); shy nocturnal hunter. sourced

For anglers

Edibility
Not eaten sourced
Fishing method
Fishing with natural bait (fish, shrimp, worm) or lures close to reef and rock structures. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless sourced
First aid
This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status. verified

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

Same genus Rypticus

More from the family Serranidae

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