Mexican blind brotula (Typhliasina pearsei) fish species and information / pictures of Mexican blind brotula - Typhliasina pearsei

Mexican blind brotula (Typhliasina pearsei) fish species information

Scientific Name
Typhliasina pearsei

Common Name
Mexican blind brotula

Biology
Dorsal soft rays (total): 75-87; Anal soft rays: 59 - 68; Vertebrae: 40 - 43. This species is distinguished by the following characters: anterior nostril placed low on snout; tip of opercular spine free; 2 pairs of psedoclaspers, inner one positioned in front of outer one; eyes not visible (eyes minute black dots in specimens less than 20 mm SL); head naked; otolith with fused colliculi; 3 lower preopercular pores; maxillary strongly vertically expanded posteriorly, knob at rear corner; 5-7 prolonged rakers on anterior gill arch; anterior anal fin pterygiophore elongated; pseudobranchial filaments absent (Ref. 55786).

Classification

Classified By

Hubbs, 1938

Class

Ray-finned fishes (Actinopterygii)

Order

Cusk eels (Ophidiiformes)

Family

Viviparous brotulas (Bythitidae)

Distribution

Region

Central America

Distribution

Central America: Yucatan Peninsula, Mexico.

Range

21°N - 20°N

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

70 m

Zone

demersal

Environment

Freshwater; demersal; depth range 0 - 70 m (Ref. 55786)

Trophic Level

3.3 s.e. 0.53 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

9.7 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 1.0000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: of no interest

Vulnerability

Low vulnerability (19 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (Assuming Fec

Threat To Humans

Harmless

IUCN Red List Status

Vulnerable (VU) (D2)