The dolphin outline has been used ever since the 60s when George Greenough took his observations of the tail of the Blue Fin Tuna and applied them to fins for his kneeboards. It is the classic, and the 7 and 8 inch models are ideal for many boards, especially 2+1 setups on longboards. It is also ideal for many smaller retro, magic carpet and mini-mal boards in the 7ft range. The 9 & 10 inch is ideal for classic beach cruisers single fins and SUPs, The small tip gives ease of entry and exit form the turn. The wide base gives hold and drive. Glass flex construction gives a classic glassed-on feel. Cut-outs on the base reduce the weight.