Harsidhhi, a contracted form or, at its very least, a form of "Harshad Amba" - The Happy Mother, is considered one of the aspect of Amba and Kalika, the Hindu Devi. She is also known by the names like Harshal, Harshad, Harshat Shikotar, Sikotar Momai and Vahanvati Mata. She is also known as Sindhoi Mata or Goddess of Sands, in Sindh in Pakistan, where her temple is located.
She is worshiped as Kuldevi by many Kshatriya and Rajput communities. The Chandrana clan of Lohanas, Brahmakshatriyas, many Jain castes as well Brahmin and Vaishya communities also worship her as their Kuldevi. She is also religiously worshiped by fishermen and other sea-faring tribes and people of Gujarat.
Harshidhhi Mata Temple also known as Harshal Mata Temple located at a place called Miani, some 30 km away from Porbandar en route to Dwarka. The main temple was originally located on a hill top facing the sea. It is said Lord Krishna had worshiped her during his lifetime and has since been living atop hill called Koyla Dungar. The original temple atop the hill is said to be have been build by Lord Krishna himself. Lord Krishna wanted to defeat the asuras and Jarasandha so he prayed to Amba Mata for power. With the blessings of the goddess, Krishna was able to defeat the Asuras. After this success, he built the temple. When Jarasandha was killed, all Yadavas over overjoyed (harshit) and they celebrated their success here. Hence the name Harshad Mata or Harsiddhi Mata. She has since been worshiped as kuldevi of Yadavs.Seth Jagdu Shah of Kutch, a Jain merchant, was saved by Harsidhhi Mata, when his ships were sinking near the sea where her temple on the hill stood. He made a new temple in 1300AD below the hill and requested Devi to move down the hill, ever since many Jain castes worship her as Kuldevi. The idol of Jagdu Shah is also situated to the right of Goddess's idol inside the temple, which is also being worshiped as per boon given to Jagdu Shah that his name, henceforth, will forever be associated with this temple.the one tampel in kamlivada in a esat gujrat jay sikoter maa 
Another famous temple is located at Ujjain, which is said to have been built by famous King Vikramāditya. Vikramaditya is said to have visited Miyani, then known as Minalpur, a port city ruled by Prabhatsen Chavda of Chawda dynasty. Vikramadiya was blessed by the Devi. He requested Harsidhhi Mata, to come to his kingdom at Ujjain, where he would worship her daily. She is also known as Vahanvati Mata.
Her temples are found in Gujarat, Rajasthan, Madhya Pradesh and Maharashtra. Some of her noted temples are located in Porbandar, Indore, Jabalpur, Ladol, Dwarka, Wadhwan, Aurangabad, Badod, Varvala, Lunavada, Chand Baori, Haripura, Kutch, etc.