What is Spiny-finned fish with ventral fins modified?

It sounds like you're describing a type of fish with specific adaptations, but the information provided is a bit incomplete. To accurately identify what you're thinking of, I need a little more context.

Could you please clarify the following:

* What is the specific function of the modified ventral fins? Are they used for walking, clinging, digging, or something else?

* Are there any other unique features about the fish? For example, do they have a particular shape, size, or color?

* Do you know anything about the fish's habitat? Where do they typically live?

Once you provide more details, I can help you identify the specific fish you're interested in.