Geotria Macrostoma
📖 Overview
Geotria Macrostoma (Geotria macrostoma), first described by Burmeister, 1868 is a large fish in the family Geotriidae (order Petromyzontiformes). Adults typically reach 62.90 cm in maximum length. It is diadromous, migrating between freshwater and marine environments during its life cycle. It occurs in Temperate waters. Diet is predominantly piscivorous, targeting other fish and larger prey. On the IUCN Red List, it is classified as Least Concern.
🔬 Taxonomy
🐟 Physical Description
This species is distinguished from G. australis by having a second dorsal fin connected with the caudal fin by a low skin fold (vs. separate), and by the position of the cloaca posterior to the origin of the second dorsal fin in immature and mature adults (cloaca anterior to or under the origin of the second dorsal fin); while the position of fins and cloaca of mature G. macrostoma remains similar to that of juvenile and sub-adults, in spawning adults of G. australis the separation between the second dorsal fin and the caudal fin becomes reduced to a notch .Cross section: oval.
🌀 Behaviour
Behavioural data for Geotria Macrostoma is currently being reviewed.
🦐 Diet
🥚 Reproduction
Semelparous .
🌍 Habitat & Distribution
Marine; freshwater; brackish; demersal; unknown. Temperate South America and Southwest Atlantic Islands: De la Plata River, Uruguay; de la Plata River to Tierra del Fuego, Argentina; Malvinas (Falkland) Islands, South Georgia.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
👥 Community & Contribute
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