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💧 Freshwater Least Concern ⚠️ Venomous ⚡ Traumatogenic 🌡️ Tropical

Serrasalmus Maculatus

Serrasalmus maculatus Kner, 1858
Max Length
26.4 cm
Max Weight
-
Lifespan
-
Trophic Level
4.1
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
23.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Occurs usually in small groups of up to 20 individuals which appear to have a definite range within a pond or a creek. Observed to be active mainly during the day. Larger fish extend their foraging until about 9 at night. where it stays in the shallows near the bottom, sheltered among vegetation . Larvae and juveniles hide and feed within the root tangle of water hyacinths, which also act as a dispersal agent during floods . Larvae feed on microscopic crustaceans and small aquatic insects; very small size juveniles (about 1.2 cm) already clip fins of other fishes . Juveniles and adults feed mostly on fins and muscle portions of fishes . Adults may scavenge on dead mammals, including humans . Attacks on humans with bite outbreaks may occur in dammed portions of rivers during the breeding season, related to brood protection by the spawning adults .

Scientific Name
Serrasalmus maculatus
Authority
Kner, 1858
Habitat
Freshwater
Climate
Tropical
Body Shape
Short and / or deep
IUCN Status
LC
Max Length
26.4 cm
Trophic Level
4.1
Resilience
High
Vulnerability
23.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal soft rays (total): 16; Anal soft rays: 33 - 35; Vertebrae: 36. : short and / or deep; Cross section: compressed.

🌀 Behaviour

Behavioural data for Serrasalmus Maculatus is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

Size at Maturity
10.8cm TL

🌍 Habitat & Distribution

Freshwater; pelagic. Tropical South America: Amazon and Paraguay-Paraná River basins (Ref.

🌿 Ecology

Zone Preferences
💧 Freshwater 🐟 Pelagic
Trophic Level
4.1±0.71
Food Items

microscopic crustaceans and small aquatic insects; very small size juveniles (about 1

📐 Morphometrics

Length–Weight Relationship: W = 0.01585 × L3.17 (TL)
Max TL
26.4cm
Dorsal Rays
16
Anal Rays
34
Vertebrae
36

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2020

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
23.00/100
Low vulnerability
Trophic Level
4.1
Apex / Top predator
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Kner, 1858

⚠️ Venom Profile

Medical Warning: This species is venomous. Seek immediate medical attention if envenomated. Contact emergency services and follow first aid guidance below.
Venom Type
proteinaceous neurotoxin
Delivery
dorsal, anal, and pelvic fin spines
Potency
Severe
Mortality Risk
Low
Symptom Onset
5min
Duration
24.0hrs
Antivenom
✗ Not Available
Named Toxins
high-molecular-weight protein (Stonustoxin analogue) acetylcholine
Symptoms
  • immediate intense pain
  • swelling
  • erythema
  • occasional nausea and weakness
Affected Body Systems
peripheral nervous system cardiovascular
First Aid
Immerse affected area in hot water (45 C, tolerable) for 30-90 minutes to denature toxin. Do not apply ice.
Medical Treatment

Analgesia; wound care; tetanus prophylaxis; severe cases may require monitoring for systemic effects.

References: Compiled from Bhide (2018), Halstead et al. (1988) and family-specific envenomation literature

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