Species: Butis koilomatodon, Mud sleeper
serrated bony ridge over eye
body: 3 double bars, 1 & 2 -> dark blotch on D1 & 2
lateral scales 25-33
Butis koilomatodon (Bleeker, 1849)
Mud sleeper
Elongate; head and snout rounded, snout short; mouth short, oblique, reaches under front edge of eye; serrated bony ridge over each eye; front nostril a short tube; lower edge of gill opening extends forward to below eye; gill rakers 4-5 upper, 6-8 lower; no downpointing spine on preopercle; gill membranes broadly joined to throat, with 6 rays; dorsal fin VI + I, 8, base of 2nd dorsal < distance from the end of that base to tail fin; anal fin I, 7-8; pectoral fin 21-22, rays branched; pelvic fins I, 5, completely separate; segmented tail fin rays 17; body scales rough; lateral scales 25-28; top of head, cheeks and operculum scaled, no enlarged scale between eyes; no lateral line.
Head and body brown, with darker scale edges; several dark bars radiating down from eye; body with a pair of oblique dark bars under each dorsal fin, which extend onto those fins, forming a dark blotch on front half of each fin; another pair of dark bars on tail base; tail fin base with dark bar; second dorsal and tail fins with rows of pale spots; lower base of pectoral fin with a conspicuous dark blotch; anal and pelvic fins dark; female and juvenile with stronger body bars.
Reaches 10.7 cm.
Lives in estuaries, enters freshwater and marine conditions.
Depth range: 0-7 m?
Natural range is the Indo-west Pacific; Intoduced to the E&W Atlantic: Panama to Brazil.
High Resolution Map Download
- Salinity
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- Freshwater
- Marine
- Brackish
- Inshore/Offshore
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- Inshore
- Inshore Only
- Water Column Position
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- Bottom
- Bottom only
- Habitat
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- Sand & gravel
- Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
- Freshwater
- Estuary
- Mangrove
- Mud
- FishBase Habitat
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- Demersal
- Feeding Group
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- Carnivore
- Data
- Diet
-
- Data
- Mobile benthic crustacea (shrimps/crabs)
- Bony fishes
- Egg Type
-
- Pelagic larva
- Data
- Benthic
- Global Endemism
-
- Exotic (Introduced)
- Greater Caribbean non-endemic
- All species.
- Regional Endemism
-
- Extends South of GC
- Also in Brazil
- Continent
- GC non-endemic
- Continent only
- Exotic (Introduced)
- All species..
- Residency
-
- Resident
- Climate Zone
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- Equatorial (0-10N, Costa Rica / Venezuela)
- IUCN Red List
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- Listed
- Least concern
- CITES
-
- Not listed
- Length Max
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- 10.7
- Depth Range Min
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- 0
- Depth Range Max
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- 7
