Only IAS, you guys are doing great work!! If possible make detailed video on each state of india and cover all aspect of physical and human geography. It will take time but it will serve as great repository on each Indian state.
Gulfs Mexico అలాస్కా (archipelago more biodiversity) California - Carabian Panama St. Lawrence (ఉత్తర అమెరికా) యూరోప్ బొట్నియా ఫిన్లాండ్ రీగా (బ్లాక్ sea) Cadize(జిబ్రాల్టర్) ఆసియా బోబెల్ maondal Eden (Yemen Akaba-israel Bahrain(Persian లో భాగం Persian Oman(harmoze) Khambat-venediam,river(coral reef కచ్ థాయిలాండ్
Gulf is not smaller. Gulfs are larger and deeper than Bays. Gulf has narrow inlet while mouth of Bay is wide. Bays are generally formed by erosion activity while Gulfs can be formed by subduction of the plates. That's why, gulfs are deeper. Bays can be seen easily near lakes or ocean. But Gulfs can only be attached to the ocean. The basic difference is that Bays are generally inner curves formation due to erosional activities of land as in case of Bay of Bengal. This particularly called as Bay because of wider mouth. So, the common difference can be made on the basis of mouth, whether it's inlet is narrow or wide. If it's inlet is narrow, it is gulf and if it's inlet is wide, it is bay.