bhoo-vigyaan swen

geophagus swenny brazil mein tokentin nadee jall nikasi kaa mool nivasi ack geophagini sicklid haye. geophagus swen lucinda ack madhyam aakar kaa sicklid haye joe maanak lambai (aiss. ell.) mein lagbhag 225 mimi taka pahunchata haye, aur aamtaur parr tokentin nadee besin mein paaya jaataa haye. isi tarah, bhoo-prishthiya swen mein ack vishisht teleost encephalon hotaa haye, jisamen mahatvapurna antar-vishisht bhinnata naheen hoti haye aur isaliye isamen dwiroopiya lakshan naheen hotey hain. 

