Which fish have a skeleton made of cartilage? Check all that apply. goldfish
hagfish
rays
seahorses
sharks
tuna

Ray's and Sharks

Explanation:

It is rays, sharks, chimeras, and skates

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg