BENTHESIKYME (or Benthesicyme) was a Haliad nymph of Aithiopia (Ethiopia) in Africa. She was a daughter of Poseidon and the wife of the first Ethiopian king Enalos (of the Sea). Benthesikyme was a goddess of the waves, as is revealed by her name which means "lady of the deep-swells," from benthos, "the depths," and kyma, "waves."
She was perhaps related to Tritonis, goddess of the Libyan Lake of the same name. Indeed Benthesikyme's "Aithiopia" could encompass this area, the term often being used to describe Africa in a general sense. If this is the case, then her husband Enalos (of the Sea) would be the Libyan Sea-God Triton. Apollodorus also mentions that she had two daughters which was true of Tritonis, whose daughters were Pallas and the Libyan Athena.
|POSEIDON & AMPHITRITE (Apollodorus 3.201)
|DAUGHTERS x2 (by Enalos) (Apollodorus 3.201)
Pseudo-Apollodorus, Bibliotheca 3. 201 (trans. Aldrich) (Greek mythographer C2nd A.D.) :
"Poseidon rescued him [his son Eumolpos by Khione] and took him to Aithiopia (Ethiopia), where he gave him to his and Amphitrite's daughter Benthesikyme to rear. When he was grown, Benthesikyme's husband gave him one of their two daughters."
- Apollodorus, The Library - Greek Mythography C2nd A.D.