This is the 11297th most frequent Russian word.
дельфинов
The Russian word "дельфинов" is the genitive plural form of "дельфин," meaning "dolphins."
The word 'дельфинов' is the genitive plural form of 'дельфин', used here to indicate possession or quantity within the noun phrase 'стая дельфинов' (a pod of dolphins).
Я видел стаю дельфинов в океане.
I saw a pod of dolphins in the ocean.
Here, 'дельфинам' is in the dative plural form, indicating the indirect object or purpose of the love expressed in the sentence.
Любовь к дельфинам изучается в биологии.
Love for dolphins is studied in biology.
The word 'дельфинах' is in the prepositional plural form, used to describe the topic of the film as related to 'о дельфинах' (about dolphins).