The voiced palatal implosive is a type of consonantal sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨ ʄ ⟩, and the equivalent X-SAMPA symbol is ⟨J\_<⟩. Typographically, the IPA symbol is a dotless lowercase letter j with a horizontal stroke (the symbol for the voiced palatal plosive) and a rightward hook (the diacritic for implosives). A very similar looking letter, ⟨ƒ⟩ (an ⟨f⟩ with a tail), is used in Ewe for /ɸ/.
Read more about Voiced Palatal Implosive: Features, Occurrence