Noun | 1. | ![]() acanthopterygian, spiny-finned fish - a teleost fish with fins that are supported by sharp inflexible rays Echeneididae, family Echeneidae, family Echeneididae - fishes having a sucking disk on the head for clinging to other fishes and to ships Echeneis naucrates, sharksucker - remoras found attached to sharks Remilegia australis, whale sucker, whalesucker - large blue Pacific remora that attaches to whales and dolphins |